User Guide M211095EN-H - Vaisala · 2017-09-15 · M211095EN-H User Guide Vaisala WINDCAP® Ultrasonic Wind Sensor Series WMT700

M211095EN-H

User GuideVaisala WINDCAP® Ultrasonic Wind Sensor

SeriesWMT700

© Vaisala 2017

No part of this manual may be reproduced,published or publicly displayed in any formor by any means, electronic or mechanical(including photocopying), nor may itscontents be modified, translated, adapted,sold or disclosed to a third party withoutprior written permission of the copyrightholder. Translated manuals and translatedportions of multilingual documents arebased on the original English versions. Inambiguous cases, the English versions areapplicable, not the translations.

The contents of this manual are subject tochange without prior notice.

Local rules and regulations may vary andthey shall take precedence over theinformation contained in this manual.Vaisala makes no representations on thismanual’s compliance with the local rules

and regulations applicable at any giventime, and hereby disclaims any and allresponsibilities related thereto.

This manual does not create any legallybinding obligations for Vaisala towardscustomers or end users. All legally bindingobligations and agreements are includedexclusively in the applicable supplycontract or the General Conditions of Saleand General Conditions of Service ofVaisala.

This product contains software developedby Vaisala or third parties. Use of thesoftware is governed by license terms andconditions included in the applicablesupply contract or, in the absence ofseparate license terms and conditions, bythe General License Conditions of VaisalaGroup.

Table of Contents

1. About This Document........................................................................................91.1 Version Information............................................................................................... 91.2 Documentation Conventions................................................................................91.3 Trademarks............................................................................................................10

2. Product Overview................................................................................................112.1 Introduction to WMT700...................................................................................... 112.2 Regulatory Compliances......................................................................................172.3 Ordering Options.................................................................................................. 18

2.3.1 Measurement Range...................................................................................... 192.3.2 Temperature Range....................................................................................... 192.3.3 Heating...........................................................................................................202.3.4 Digital Communication Interface................................................................ 202.3.5 Digital Communication Profile......................................................................212.3.6 Digital Communication Units........................................................................212.3.7 Analog Output Signal for Wind Speed Channel.........................................212.3.8 Analog Output Signal for Wind Direction Channel...................................232.3.9 Connection Cables........................................................................................ 242.3.10 Mounting Adapters....................................................................................... 242.3.11 Accessories.................................................................................................... 252.3.12 Manual............................................................................................................ 252.3.13 Example of WMT703 Configuration........................................................... 26

2.4 Accessories...........................................................................................................262.4.1 Bird Cage........................................................................................................272.4.2 Zero Wind Verifier.........................................................................................272.4.3 Cables............................................................................................................. 282.4.4 Cable Tightening Tool...................................................................................29

3. Functional Description.....................................................................................313.1 Operating Principle...............................................................................................313.2 Coordinate Systems: Vector and Polar Calculations....................................... 343.3 Wind Speed and Direction Averaging...............................................................35

3.3.1 Scalar Averaging........................................................................................... 363.3.2 Wind Direction Coasting.............................................................................. 373.3.3 Vector Averaging...........................................................................................37

3.4 Measurement Methods....................................................................................... 383.4.1 Continuous Measurement............................................................................ 383.4.2 Wind Measurement on Request..................................................................38

3.5 Host System Connections and Interfaces.........................................................38

Table of Contents

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3.6 Serial Communication and Analog Output...................................................... 393.7 Serial Communication........................................................................................ 40

3.7.1 Communication Interface............................................................................ 403.7.2 Profiles........................................................................................................... 403.7.3 Protocols......................................................................................................... 413.7.4 Measurement and Configuration Modes.....................................................413.7.5 Serial Interface Timing..................................................................................42

3.8 Analog Output..................................................................................................... 433.8.1 Analog Output Types................................................................................... 433.8.2 Analog Output Scaling.................................................................................453.8.3 Limitations for Output Signals.....................................................................473.8.4 Missing Readings and Error Indication.......................................................48

3.9 Heating................................................................................................................. 483.9.1 Heated Transducers......................................................................................493.9.2 Heated Transducers and Arms.................................................................... 493.9.3 Heated Body, Transducers, and Arms........................................................ 50

4. Installation.............................................................................................................514.1 Installing WMT700............................................................................................... 51

4.1.1 Maritime Installations.....................................................................................514.2 Placing WMT700.................................................................................................. 514.3 Unpacking and Handling WMT700................................................................... 524.4 Connecting WMT700 Cable...............................................................................544.5 Mounting WMT700 on Vertical Pole Mast........................................................ 574.6 Mounting WMT700 on Sensor Support Arm or Cross Arm Using

WMT70FIX........................................................................................................... 604.7 Aligning WMT700............................................................................................... 63

4.7.1 Configuring Wind Direction Offset............................................................. 654.7.2 Analog Output Parameter for WMT700 in Tunnels and Cranes............. 65

4.8 Installing Bird Cage............................................................................................. 704.8.1 Installing Bird Net...........................................................................................71

4.9 Wiring....................................................................................................................724.9.1 Cables............................................................................................................. 724.9.2 Cable 2 m, Cable 10 m, Cable 15 m, and Cable 26 m.................................734.9.3 RS-485 for COM2 with Cable 2 m and 10 m...............................................744.9.4 RS-485 Cable 2 m and RS-485 Cable 10 m................................................ 754.9.5 Connector Signals......................................................................................... 75

4.10 Powering...............................................................................................................764.10.1 Operating Power........................................................................................... 774.10.2 Heating Power............................................................................................... 79

4.11 Upgrade from WS425 to WMT700................................................................... 824.11.1 Mounting with WS425 Mounting Kit.......................................................... 834.11.2 Upgrade Prerequisites..................................................................................864.11.3 Upgrading from WS425 to WMT700......................................................... 884.11.4 Mounting WMT700 with ASOS Mounting Adapter..................................904.11.5 Connection Cable Prerequisites.................................................................. 924.11.6 Wiring in Retrofit Installations.....................................................................934.11.7 Powering in Retrofit Installations................................................................97

5. Operation..............................................................................................................995.1 Communicating with Terminal Software.......................................................... 995.2 Entering and Exiting Configuration Mode......................................................100

5.2.1 OPEN — Entering Configuration Mode.................................................... 1005.2.2 CLOSE — Exiting Configuration Mode....................................................... 101

WMT700 User Guide M211095EN-H

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5.3 Configuration...................................................................................................... 1015.4 Parameter Handling Commands...................................................................... 102

5.4.1 S — Set Parameter.......................................................................................1035.4.2 G — Get Parameter..................................................................................... 1045.4.3 BAUD — Display or Set Port Settings....................................................... 105

5.5 Wind Measurement Control Commands.........................................................1065.5.1 MEAS — Single Wind Measurement..........................................................1065.5.2 START — Start Continuous Measurement................................................1065.5.3 STOP — Stop Wind Measurement............................................................. 106

5.6 Diagnostics and Support Commands............................................................. 1065.6.1 ERRORS — Get Error Codes and Counts..................................................1065.6.2 CLEARERR — Reset Error Codes and Counts.......................................... 1075.6.3 POLL — Get Message.................................................................................. 1075.6.4 RESET — Reset CPU....................................................................................108

5.7 Information Commands.................................................................................... 1085.7.1 ? — Display Command Set......................................................................... 1085.7.2 H — Display Help and Messages................................................................1085.7.3 VERSION — Show Firmware Version........................................................ 1085.7.4 WIND_GET — Get Calibration Data.......................................................... 109

5.8 Configuration Parameters................................................................................ 1095.9 Configurable Data Messages............................................................................109

5.9.1 Configuring Data Messages........................................................................ 1105.9.2 Status Flags................................................................................................... 1135.9.3 Loading Settings from Configuration Files................................................115

5.10 Operating WMT700............................................................................................ 1175.10.1 Operating WMT700 with Terminal Program............................................. 1185.10.2 Data Messages.............................................................................................. 1195.10.3 Missing Readings......................................................................................... 1245.10.4 Error Indication............................................................................................ 124

5.11 Measurement Mode Commands.......................................................................1255.11.1 WMT700 Profile Commands...................................................................... 1255.11.2 ROSA - MES12 Profile Commands............................................................. 128

5.12 Operating WMT700 in WS425 Analog Output Mode................................... 1285.12.1 Analog Output Settings.............................................................................. 128

5.13 Wind Speed Output........................................................................................... 1295.13.1 Frequency..................................................................................................... 1295.13.2 Voltage..........................................................................................................130

5.14 Wind Direction Output....................................................................................... 1315.15 Limitations for Output Signals..........................................................................1325.16 Missing Readings and Error Indication............................................................ 1325.17 Operating WMT700 with WS425 and SDI-12 Profiles................................... 1335.18 Communication Profiles.................................................................................... 133

5.18.1 Changing Communication Profile..............................................................1335.19 Operating WMT700 with Terminal Program.................................................. 1345.20 Entering Configuration Mode........................................................................... 1355.21 F/G ASOS Profile................................................................................................ 135

5.21.1 WS425 F/G ASOS Commands................................................................... 1365.21.2 WS425 F/G ASOS Data Message.............................................................. 140

5.22 WS425 A/B NMEA Standard Profile................................................................1425.22.1 WS425 A/B NMEA Standard Data Message ........................................... 143

5.23 WS425 NMEA Extended Profile (v. 0183).......................................................1445.23.1 WS425 A/B NMEA Extended Commands................................................ 1455.23.2 WS425 A/B NMEA Extended Data Message .......................................... 146

Table of Contents

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5.24 WS425 A/B ASCII Profile.................................................................................. 1475.24.1 WS425 A/B ASCII Commands................................................................... 148

5.25 WS425 A/B WAT11 Profile.................................................................................1505.25.1 WS425 A/B WAT11 Commands................................................................... 151

5.26 SDI-12 Profile (v 1.3)............................................................................................ 1515.26.1 SDI-12 Commands........................................................................................153

5.27 SDI-12 Data Messages....................................................................................... 1605.27.1 WS425 A/B SDI-12 Message for C and M Command.............................. 1605.27.2 WS425 A/B SDI-12 Message for V Command........................................... 1615.27.3 Requesting Cyclic Redundancy Check.......................................................161

6. Maintenance....................................................................................................... 1636.1 WMT700 Maintenance...................................................................................... 1636.2 Testing Operation.............................................................................................. 164

7. Troubleshooting............................................................................................... 1677.1 Problem Situations.............................................................................................1677.2 Error and Event Messages.................................................................................1697.3 Restoring Serial Port Settings.......................................................................... 170

8. Technical Data................................................................................................... 1738.1 Measuring Specifications...................................................................................1738.2 Electrical Specifications.....................................................................................1748.3 Environmental Specifications........................................................................... 1758.4 Mechanical Specifications................................................................................. 1768.5 Accessory List..................................................................................................... 177

Appendix A: Command Set for WMT700...................................................... 181

Appendix B: Typical System Environments..................................................183

Appendix C: Default Settings for Different CommunicationProfiles ............................................................................................. 185

C.1 Default Settings for Different Communication Profiles.................................185

Appendix D: Configuration Parameter Descriptions................................ 187

Appendix E: WMT700 NMEA MWV Profile ................................................. 193E.1 Configurable Parameters.................................................................................. 193E.2 WMT700 NMEA MWV Commands.................................................................. 194E.3 WMT700 NMEA MWV Data Message..............................................................195

E.3.1 Missing Readings......................................................................................... 195

Appendix F: WMT700 Accessories.................................................................. 197

Appendix G: Certificate........................................................................................ 199

Index..............................................................................................................................201

Warranty..................................................................................................................... 205

Technical Support................................................................................................... 205

Recycling.................................................................................................................... 205


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List of Figures

Figure 1 WMT700 Wind Sensor..................................................................................... 12Figure 2 WMT700 from Below....................................................................................... 13Figure 3 FIX70 Mounting Kit........................................................................................... 14Figure 4 WS425FIX60-POM............................................................................................15Figure 5 WMT700FIX60-POM........................................................................................ 15Figure 6 WS425FIX60-RST and WS425FIX60.......................................................... 16Figure 7 WMT700FIX60-RST......................................................................................... 16Figure 8 Example of WMT703 Configuration............................................................26Figure 9 Bird Cage.............................................................................................................27Figure 10 Zero Wind Verifier............................................................................................ 27Figure 11 Cable Tightening Tool......................................................................................29Figure 12 Ultrasonic Measurement Principle............................................................... 32Figure 13 Measurement Paths of WMT700..................................................................33Figure 14 Wind Speed and Direction Presentations (Direction Offset Is 0)....... 35Figure 15 Example of Wind Direction Averaging....................................................... 37Figure 16 WMT700 External Interfaces.........................................................................39Figure 17 Configuration and Measurement Modes....................................................42Figure 18 Timing for RS-232, RS-485, and RS-422 Interfaces................................43Figure 19 Frequency Output............................................................................................44Figure 20 Removing WMT700 Bottom Transportation Damper............................53Figure 21 Handling WMT700........................................................................................... 53Figure 22 Mounting WMT700 on Side of Mast............................................................58Figure 23 Mounting WMT700 on Top of Mast.............................................................58Figure 24 WMT700 North Arrow.................................................................................... 64Figure 25 WMT700 in Tunnels......................................................................................... 67Figure 26 mA Output in Tunnels......................................................................................67Figure 27 Analog Output for Wind Speed and Wind Speed Alarm......................68Figure 28 mA Output in Cranes.......................................................................................69Figure 29 WMT700 Bird Cage and Bird Cage Straps................................................. 71Figure 30 COM2 RS-485 Wiring.......................................................................................74Figure 31 Pins for 17-Pin M23 Connector...................................................................... 75Figure 32 Wiring of Non-heated WMT700 Versions................................................. 77Figure 33 Operating Supply Current Consumption................................................... 78Figure 34 Operating Supply Power Consumption......................................................79Figure 35 Wiring of Heated WMT700 Versions, Part 1............................................. 80Figure 36 Wiring of Heated WMT700 Versions, Part 2..............................................81Figure 37 Retrofit Installation to Pole Mast................................................................. 84Figure 38 Retrofit Installation to Cross Arm with Array Facing Up.......................85Figure 39 Retrofit Installation to Cross Arm with Array Facing Down................. 86Figure 40 FIX30, WS425FIX60-RST, and WS425FIX60-POM.................................87Figure 41 Mounting Adapter for FIX30, WS425FIX60 (Left), and

Mounting Adapter for FIX70 (Right)...........................................................87Figure 42 Installing with ASOS Mounting Adapter....................................................90Figure 43 Wind Speed Frequency Analog Output with WS425 Cable

and Adapter Cable for Analog Frequency Output................................ 130Figure 44 Wind Speed Voltage Analog Output with WS425 Cable

and Adapter Cable for Analog Voltage Output....................................... 131Figure 45 Wind Direction Voltage Output with WS425 Cable and

Adapter Cable.................................................................................................. 132Figure 46 WMT700 Dimensions.....................................................................................176Figure 47 WMT70FIX Mounting Kit Dimensions........................................................177Figure 48 ASOS Mounting Adapter Dimensions........................................................177

List of Figures

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Figure 49 System Environment with Serial Port COM1 Only.................................. 183Figure 50 System Environment with Analog Output Only..................................... 183Figure 51 System Environment with Serial Ports COM1 and COM2..................... 184Figure 52 System Environment with Backup Battery..............................................184Figure 53 Complete Set of WMT700 Accessories.................................................... 197


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List of Tables

Table 1 Document Versions.............................................................................................. 9Table 2 Environmental Tests............................................................................................17Table 3 Electromagnetic Compatibility Tests............................................................. 17Table 4 Ordering Options.................................................................................................18Table 5 Measurement Ranges of Different Sensor Types....................................... 19Table 6 Temperature Range............................................................................................ 19Table 7 Heating..................................................................................................................20Table 8 Digital Communication Interface................................................................... 20Table 9 Digital Communication Profile.........................................................................21Table 10 Digital Communication Units............................................................................21Table 11 Output Configuration........................................................................................ 22Table 12 Analog Output Signal for Wind Direction....................................................23Table 13 Connection Cables............................................................................................. 24Table 14 Mounting Adapters............................................................................................ 25Table 15 Accessories...........................................................................................................25Table 16 Manual....................................................................................................................25Table 17 Cables.................................................................................................................... 28Table 18 Factory Settings for Analog Wind Speed Output..................................... 45Table 19 Factory Default Settings for Analog Wind Direction Output.................45Table 20 Common Transfer Function Settings for Aout1 (WS)...............................46Table 21 Common Transfer Function Settings for Aout2 (WD)............................. 46Table 22 aout_map Values.............................................................................................. 65Table 23 Wind y and x components at Different Wind Direction Angles............66Table 24 Connecting Cable 2 m, Cable 10 m, Cable 15 m, and Cable 26 m..........73Table 25 COM2 RS-485 Wiring.........................................................................................74Table 26 Connecting RS-485 Cable 2 m (228259SP) and

RS-485 Cable 10 m (228260SP)..................................................................... 75Table 27 Pin-Out for 17-Pin M23 Connector..................................................................76Table 28 Operating Power Supply Voltage Requirements.......................................77Table 29 Heating Power Supply Requirements...........................................................79Table 30 Heating Power and Extension Cable.............................................................80Table 31 Sensor Power of Different Heating Options................................................82Table 32 heaBMaxPower Parameter Values.............................................................. 82Table 33 Mounting Kits and Cable Codes..................................................................... 88Table 34 ROSA Cable 10 m (231425SP).........................................................................94Table 35 Pin-Outs for WS425 Serial Adapter Cable (227569SP)...........................95Table 36 Pin-Outs for WS425 Analog Frequency Output Adapter Cable........... 96Table 37 Pin-Outs for WS425 Analog Voltage Output Adapter Cable.................96Table 38 WMT700 and WS425 Analog Output Connections..................................97Table 39 List of Configuration Mode Commands......................................................102Table 40 Wind Measurement Items for Data Messages........................................... 110Table 41 Control Character................................................................................................ 111Table 42 Monitoring Items for Data Messages............................................................. 111Table 43 Status ....................................................................................................................113Table 44 Data Messages.................................................................................................... 119Table 45 Measurement Mode Commands................................................................... 126Table 46 Required Parameters for WS425 Analog Output Operation Mode.... 129Table 47 Configurable Parameters for WS425 F/G ASOS Profile ........................ 135Table 48 WS425 F/G ASOS Commands....................................................................... 136Table 49 WS425 F/G ASOS Data Message................................................................... 141Table 50 Configurable Parameters for WS425 A/B NMEA Standard Profile.....142Table 51 WS425 NMEA Extended Profile Parameter Descriptions......................144

List of Tables

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Table 52 Checksum Table................................................................................................ 146Table 53 WS425 A/B ASCII Commands.......................................................................148Table 54 Configurable Parameters for WS425 A/B WAT11 Profile........................ 151Table 55 Configurable Parameters................................................................................ 152Table 56 SDI-12 Commands............................................................................................. 153Table 57 Error and Event Messages.............................................................................. 169Table 58 Restored Serial Port Settings..........................................................................171Table 59 WMT700 Wind Speed Measuring Specifications..................................... 173Table 60 WMT700 Wind Direction Measuring Specifications................................173Table 61 WMT700 Electrical Specifications................................................................174Table 62 WMT700 Output Specifications....................................................................174Table 63 WMT700 Environmental Specifications......................................................175Table 64 WMT700 Mechanical Specifications............................................................ 176Table 65 Tools...................................................................................................................... 177Table 66 Bird Obstructions.............................................................................................. 178Table 67 Cables................................................................................................................... 178Table 68 WMT700 Mounting Accessories................................................................... 178Table 69 WS425 Mounting Accessories....................................................................... 179Table 70 Command Set for WMT700............................................................................ 181Table 71 Default Settings for Different Digital Communication Profiles............ 185Table 72 Parameters with No Protocol-specific Default Value..............................186Table 73 Configuration Parameter Descriptions........................................................187Table 74 Configurable Parameters for WMT700 NMEA MWV Profile.................193


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1. About This Document

1.1 Version Information

Table 1 Document Versions

Document Code Date Description

M211095EN-H April 2017 Added 3 new commands for WS425 F/G ASOS protocol. Addedinformation about the new ASOS adapter.

M211095EN-G February 2017 Previous version

1.2 Documentation Conventions

alerts you to a fatal hazard. If you do not read and follow instructionscarefully at this point, death will follow.DANGER!

alerts you to a serious hazard. If you do not read and follow instructionscarefully at this point, there is a risk of injury or even death.WARNING!

warns you of a potential hazard. If you do not read and follow instructionscarefully at this point, the product could be damaged or important data could be lost.CAUTION!

Note highlights important information on using the product.

Tip gives information for using the product more efficiently.

Chapter 1 – About This Document

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1.3 TrademarksVaisalaâ and WINDCAPâ is a registered trademark of Vaisala Oyj. Windowsâ is a registeredtrademark of Microsoft Corporation in the United States and/or other countries.

All other product or company names that may be mentioned in this publication are tradenames, trademarks, or registered trademarks of their respective owners.


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2. Product Overview

2.1 Introduction to WMT700WMT700 measures wind speed and direction, and sends the measurement results to dataacquisition systems. WMT700 is suitable for systems and stand-alone installations.

The WMT700 series consists of four product types with different measurement ranges:WMT701, WMT702, WMT703, and WMT704. You can select heating functions that shield thearray and/or the transducers and the sensor body from ice and snow build-up in coldclimates.

The WMT700 series wind sensors are based on the advanced, patented Vaisala WINDCAPwind measurement technology that ensures accurate results in all wind directions. Theeffects of temperature, humidity, and pressure are fully compensated.

Since the wind sensors have no moving parts, they are virtually maintenance-free. Theperformance of the sensors does not degrade with wear nor is it affected by naturalcontaminants such as salt, dust, or sand.

The WMT700 series wind sensors support a wide range of communication options. You canconnect the wind sensors directly to a variety of data acquisition systems without additionalconverters or adapters.

WMT700 is configured at the factory according to your order, and it is ready for operationdirectly after the installation. You also have a wide range of configuration options andmeasurement settings.

WMT700 can be equipped with accessories to tailor the instrument to match different user-specific needs. The accessories include a bird deterrent solution and a field-usablecalibration verifier.

Chapter 2 – Product Overview

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Figure 1 WMT700 Wind Sensor

The array consists of 1, 8, and 9.

1 Top of WMT700 with North arrow2 Orange sticker marking North arm3 Hot warning sticker4 Type label5 Mounting screw6 Mounting adapter7 Body8 Transducer arms (3 pcs)9 Transducers (3 pcs)


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Figure 2 WMT700 from Below

1 Mounting adapter screw (3 pcs; use 4-mm Allen key)2 17-pin M23 male connector3 Waterproof vent

Do not open the sensor. There are no user-serviceable parts inside.


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Figure 3 FIX70 Mounting Kit

1 Fix body2 Removable mast guide with mounting hardware3 Mounting hardware (M6 nuts, washers)4 U bolts for Ø 30 mm mast (2 pcs)5 U bolts for Ø 60 mm mast (2 pcs)


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Figure 4 WS425FIX60-POM

1 Clamp2 Label

Figure 5 WMT700FIX60-POM

1 Clamp2 Label


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Figure 6 WS425FIX60-RST and WS425FIX60

1 Label2 Clamp

Figure 7 WMT700FIX60-RST

1 Label2 Clamp


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2.2 Regulatory CompliancesVaisala WINDCAP Ultrasonic Wind Sensor WMT701, WMT702, WMT703, and WMT704comply with the performance and environmental test standards listed below.

Table 2 Environmental Tests

Test Setup According to

Wind driven rain MIL-STD 810G Method 506.5

Salt fog IEC 60068-2-52, VDA 621 - 415

Leak test (Ingression Protection) IEC 60529 class IP67

Vibration IEC 60068-2-6

Shock MIL-STD-202G, Method 213B, cond. J

Dry heat IEC 60068-2-2

Damp heat cyclic IEC 60068-2-30

Damp heat IEC 60068-2-78

Low temperature IEC 60068-2-1

Free fall (rough handling) IEC 60068-2-31

Change of temperature IEC 60068-2-14

Wind tunnel tests have been performed according to Sonic anemometers/thermometers -Acceptance test methods for mean wind measurements ISO 16622:2002 and MeasnetAnemometer Calibration Procedure Version 2, October 2009.

EMC tests are based on a European product family standard: EN 61326-1:2013 (Electricalequipment for measurement, control and laboratory use - EMC requirements for use inindustrial locations) and EN 60945:2002 (Maritime Navigation and RadiocommunicationEquipment and Systems - General Requirements - Methods of Testing and Required TestResults).

Table 3 Electromagnetic Compatibility Tests


Conducted RF immunity IEC 61000-4-6

EFT immunity IEC 61000-4-4

Surge immunity IEC 61000-4-5

ESD immunity IEC 61000-4-2

High voltage (Dielectric tests) IEC 60947-2

Conducted emissions1) CISPR 22


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Radiated emissions CISPR 22

RF field immunity IEC 61000-4-3

Insulation resistance IEC 60092-504

1) Limits according to IEC 60945: Maritime navigation and radiocommunication equipment and systems - General requirements- Methods of testing and required test results. 4th edition, 2002-08. See G. Certificate (page 199)

2.3 Ordering Options

Table 4 Ordering Options

Ordering OptionNumber

Ordering Option

1 Measurement range

2 Temperature range

3 Heating

4 Digital communication interface

5 Digital communication profile

6 Digital communication unit

7 Analog output signal for wind speed channel

8 Analog output signal for wind direction channel

9 Connection cables

10 Mounting adapters

11 Not in use

12 Accessories

13 Manuals

If required, you can change:

• 2.3.4 Digital Communication Interface (page 20)• 2.3.5 Digital Communication Profile (page 21)• 2.3.6 Digital Communication Units (page 21)• 2.3.7 Analog Output Signal for Wind Speed Channel (page 21)• 2.3.8 Analog Output Signal for Wind Direction Channel (page 23)


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More Information

‣ Configuration (page 101)

2.3.1 Measurement RangeOrdering option 1 defines the wind speed operation range. The maximum reported value ofwind speed 40, 65, 75, or 90 m/s, depending on the selected option. Accredited WindCalibration according to Measnet procedure.

Table 5 Measurement Ranges of Different Sensor Types

Sensor Type Measurement Range

1 WMT701 up to 40 m/s




A WMT701 up to 40 m/s + Accredited Wind Calibration

B WMT702 up to 65 m/s + Accredited Wind Calibration

C WMT703 up to 75 m/s + Accredited Wind Calibration

D WMT704 up to 90 m/s + Accredited Wind Calibration

2.3.2 Temperature RangeOrdering option 2 defines the operating temperature range for the sensor.

Table 6 Temperature Range

Option Temperature Range

A -10 ... +60 °C

B -40 ... +60 °C

C -55 ... +70 °C

The temperature range is not connected to heating in any way. If you operate in ademanding environment where ice accumulation is expected, Vaisala recommends using aheated sensor.


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2.3.3 HeatingOrdering option 3 defines if the sensor is equipped with extra heating for demandingenvironmental conditions. Option 4 providing full sensor heating is best suited for mostdemanding environments.

Power consumption requirement depends on the selected heating option.

Table 7 Heating

Option Heating

1 Non-heated

2 Heated transducers (Min. 30 W power supply is needed)

3 Heated transducers and arms (Min. 150 W needed)

4 Heated transducers, arms, and body (Min. 250 W needed)

Vaisala recommends using heated versions of WMT700 in environmental conditionswhere snow and ice build-up is possible.

2.3.4 Digital Communication InterfaceOrdering option 4 defines the serial line physical interface. Four different standardcommunication interfaces are available. In addition, there is a service port.

Table 8 Digital Communication Interface

Option Hardware Interface

A RS-485 isolated (1 pair)

B RS-422 isolated

C RS-232 isolated

D SDI-12 isolated

To change the product version characteristics listed in Table 8 (page 20), contact VaisalaService Center.


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2.3.5 Digital Communication ProfileOrdering option 5 defines the used communication protocol. WS425 options are usable andbackwards compatible when replacing a WS425 sensor with a WMT700 unit. Otherapplication or customer-specific user profiles are also available.

Table 9 Digital Communication Profile

Option Communication Profile

0 WMT70 - default mode 9600, 8, N, 1 Polled

1 WS425 - ASCII 2400, 8, N, 1 Polled

2 WS425 - NMEA Extended (v0183)

9600, 8, N, 1 Auto send 1/s

3 WS425 - SDI-12 (v 1.3) 1200, 7, E, 1 Polled

4 WS425 - ASOS 2400, 8, N, 1 Polled

5 ROSA - MES12 9600, 8, N, 1 Polled

8 AWS520 - NMEA Extended (v0183)

4800, 8, N, 1 Auto send 1/s

A MARINE1 (v 0183) 4800, 8, N, 1 Auto send 1/s

2.3.6 Digital Communication UnitsOrdering option 6 offers four different digital communication options.

Table 10 Digital Communication Units

Option Unit Used

A Meters per second

B Knots

C Miles per hour

D Kilometers per hour

2.3.7 Analog Output Signal for Wind Speed ChannelOrdering option 7 can be disabled or factory-configured for 8 different modes. WS425options are usable and backwards compatible when replacing WS425 sensor with aWMT700 unit.


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Table 11 Output Configuration

Option Output Configuration

0 Disabled

1 Voltage output 100 mV/m/s

0 mV = 0 m/s

4000 mV = 40 m/s (WMT701 maximum wind speed)




3 Current output 4 … 20 mA, offset 4 mA

4 mA = 0 m/s

20 mA = 40 m/s (WMT701, 0.4 mA/m/s)

20 mA = 65 m/s (WMT702, 0.24615 mA/m/s)

20 mA = 75 m/s (WMT703, 0.21333 mA/m/s)

20 mA = 90 m/s (WMT704, 0.177778 mA/m/s)

Error indication sets output to 2 mA

4 Current output 0.2 mA/m/s

0 mA = 0 m/s

8 mA = 40 m/s (WMT701 maximum wind speed)




6 Frequency output 10 Hz/m/s

0 Hz = 0 m/s

400 Hz = 40 m/s (WMT701 maximum wind speed)




7 WS425 voltage output 8 mV/mph

0 mV = 0 m/s

716 mV = 89.5 mph (WMT701 maximum wind speed)

1116 mV = 145 mph (WMT702 maximum wind speed)

1344 mV = 168 mph (WMT703 maximum wind speed)

1610.4 mV = 201.3 mph (WMT704 maximum wind speed)


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Option Output Configuration

8 WS425 frequency output 5 Hz/mph

0 Hz = 0 m/s

447.5 Hz = 89.5 mph (WMT701 maximum wind speed)

725 Hz = 145 mph (WMT702 maximum wind speed)

840 Hz = 168 mph (WMT703 maximum wind speed)

1006.5 Hz = 201.3 mph ( WMT704 maximum wind speed)

A Push up output, 10 Hz/m/s

0 Hz = 0 m/s





B Pull down output 10 Hz/m/s

0 Hz = 0 m/s





2.3.8 Analog Output Signal for Wind Direction ChannelOrdering option 8 defines analog output signal for wind direction. WS425 Potentiometeroutput is backward compatible when replacing WS425 with a WMT700 unit.

Table 12 Analog Output Signal for Wind Direction

Selection Output Configuration

0 Disabled

A Voltage output 20 mV/degree

0 mV = 0 degree

7200 mV = 360 degree

D Current output 50 uA/degree

0 uA = 0 degree

18 mA = 360 degree


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Selection Output Configuration

E Current output 4 … 20 mA (44.444 uA/degree)

4 mA = 0 degree

20 mA = 360 degree km/h

F WS425 Potentiometer output

0% of Vref= 0 degree

100% of Vref = 360 degree

More Information

‣ Coordinate Systems: Vector and Polar Calculations (page 34)

2.3.9 Connection CablesOrdering option 9 defines connection cables.

Table 13 Connection Cables

Selection Cable type

1 No cables

2 Cable 2 m, cable connector, open leads on one end

3 Cable 10 m, cable connector, open leads on one end

4 MAWS cable 10 m

5 AWS520 cable 10 m. Shield connected to PE pin

6 Adapter cable for WS425 serial

7 Adapter cable for WS425 analog frequency output

8 RS485 cable 2 m, cable connector, open leads on one end

9 RS485 Cable 10 m, cable connector, open leads on one end

A Adapter cable for WS425 analog voltage output

B AWS520 cable 10 m. Shield not connected to PE pin.

C ROSA analog cable 10 m, cable connector, open leads on one end

D Junction Box with Cable 2 m

E Cable 15 m, cable connector, open leads on one end

F Cable 26 m, cable connector, open leads on one end

2.3.10 Mounting AdaptersOrdering option 10 defines mounting adapters.


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Table 14 Mounting Adapters

Option Adapter Type

A Adapter 228869 only. Standard adapter, no fix

B Adapter 228869 with WMT70FIX70 fixing mechanics. Also suitable for invertedmounting. Standard adapter for general purpose

C Adapter 228869 with WMT700FIX60-POM. Standard adapter with plastic fix for 60 mmpole

D Adapter 228869 with WMT700FIX60-RST Standard adapter with stainless steel fix for60 mm pole

E Adapter 22877 only (used for old WS425 FIX30/WS425FIX60), WS425-compatibleadapter, no fix

F Adapter 228777 with WS425FIX60. WS425-compatible adapter with WS425FIX60

G Adapter 228869 with ASM212140 (suitable for mounting 4258057). ASOS mountingadapter

Ordering option 11 is reserved for future use.

2.3.11 AccessoriesOrdering option 12 defines WMT700 accessories.

Table 15 Accessories

Option Accessories

A No accessories

B Bird cage (WMT70BirdKit)

2.3.12 ManualOrdering option 13 defines the available manual version and possible special packagedesign.

Table 16 Manual

Option Manual

1 No manual

2 English manual

3 Japanese manual


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Option Manual

4 Chinese manual

5 Russian manual

2.3.13 Example of WMT703 Configuration

Figure 8 Example of WMT703 Configuration

More Information

‣ Heating (page 48)

2.4 AccessoriesWMT700 can be tailored to your needs with several accessories. The accessories include:

• Mounting adapters for different mast diameters• Cables for different host systems and preferred communication types• Bird prevention kit• Field calibration kit• Cable tightening tool


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2.4.1 Bird Cage

Figure 9 Bird Cage

Vaisala recommends using the optional bird cage (WMT70BirdKit) in areas with large birdpopulations. The cage is designed to prevent large birds from disturbing the wind speed anddirection measurements.

You can install the bird cage on a mounted WMT700 without dismounting the wind sensor.In cold climates, accumulated snow or ice on the bird cage can disturb the measurement. Insuch conditions, perform frequent visual inspections of WMT700 to avoid ice or snow build-ups.

2.4.2 Zero Wind Verifier

Figure 10 Zero Wind Verifier


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The optional WMT700 zero wind verifier (WMT70Verifier) is a small echo-free chamber fortesting the mechanical integrity of WMT700 and performing one-point calibration. Theverifier ensures that the array is undamaged and that the transducers are parallel to eachother. You can perform the verifier test also in the field.

2.4.3 CablesSelect the cables according to your operating environment.

Table 17 Cables

Order Code Description Purpose

WMT70Conn Cable connector Cable

227567SP Cable 2 m, cable connector, open leadson one end

Used for analog output or serial communicationwith two serial ports.







228259SP RS-485 cable 2 m, cable connector,open leads on one end

Used for serial communication with RS-485interface.

228260SP RS-485 Cable 10 m, cable connector,open leads on one end

Used for serial communication with RS-485interface.

227565SP MAWS cable 10 m Used for connecting WMT700 to Vaisala AutomaticWeather Station MAWS.

229807SP AWS520 cable 10 m, shield connectedto PE pin

Used for connecting WMT700 to Vaisala Fixed SiteObservation System AWS520.

227566SP AWS520 cable 10 m, shield notconnected to PE pin

Used for connecting WMT700 to Vaisala Fixed SiteObservation System AWS520.

231425SP ROSA analog cable 10 m, cableconnector, open leads on one end

Used for connecting WMT700 to Vaisala RoadWeather System ROSA.

227569SP Adapter cable for WS425 serial Used for connecting the WS425 cable to WMT700.Only applicable for retrofit installations.

227570SP Adapter cable for WS425 analogfrequency output

Used for connecting the WS425 cable to WMT700.Only applicable for retrofit installations.

227571SP Adapter cable for WS425 analogvoltage output

Used for connecting the WS425 cable to WMT700.Only applicable for retrofit installations.

ASM210719SP Junction Box with Cable 2 meters Used when a cable longer than 10 meters is needed.Junction Box contains terminal blocks that extendthe 2-meter cable to a needed length.


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2.4.4 Cable Tightening Tool

Figure 11 Cable Tightening Tool

WMT700 is shipped with a cable tightening tool (237888SP). When you insert a cable in thecable tightening tool, it is easier to grip and rotate. After tightening, you can leave the cabletightening tool in place.


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3. Functional Description

3.1 Operating PrincipleWMT700 uses the Vaisala WINDCAP ultrasonic sensor technology in wind measurement.The sensor has an onboard microcontroller that captures and processes data andcommunicates over serial interfaces.

The wind sensor has an array of three equally spaced ultrasonic transducers on a horizontalplane. Wind speed (WS) and wind direction (WD) are determined by measuring the time ittakes the ultrasound to travel from each transducer to the other two.

The wind sensor measures the transit time (in both directions) along the three pathsestablished by the array of transducers. The transit time depends on wind speed along theultrasonic path. For zero wind speed, both the forward and reverse transit times are thesame. With wind along the sound path, the upwind direction transit time increases and thedownwind transit time decreases.

The following figure shows how the time shift of the ultrasonic signals is measured and howtail wind and forward wind affect the measurement.

Chapter 3 – Functional Description

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Figure 12 Ultrasonic Measurement Principle

1 Ultrasonic measurement with zero wind2 Impact of tail wind on ultrasonic measurement3 Impact of head wind on ultrasonic measurement

The microcontroller calculates WS from the measured transit times using the followingformula:


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VW=0.5·L·(1/tf-1/tr)

VW Wind velocity

L Distance between two transducers

tf Transit time in the forward direction

tr Transit time in the reverse direction

Measuring the six transit times allows Vw to be computed for each of the three ultrasonicpaths. Using Vw values of two array paths is enough to compute WS and WD.

The different paths of WMT700 and the vectors provided by the wind sensor:

Figure 13 Measurement Paths of WMT700

1–6 Measurement paths 1 to 6 of WMT700La, Lb, Lc Distance between two transducers

The vectors are calculated as follows:

Va=0.5·La·(1/A1-1/A2)Vb=0.5·Lb·(1/A3-1/A4)Vc=0.5·Lc·(1/A5-1/A6)


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The equation depends on the accurate distance of the measurement path (L). The computedwind speeds are independent of altitude, temperature, and humidity, which are canceled outwhen the transit times are measured in both directions, although the individual transit timesdepend on these parameters.

3.2 Coordinate Systems: Vector and PolarCalculations

The triangular geometry of the sensor is converted to orthogonal coordinates to achieve thex and y components. Then the sensor converts the wind vectors into polar coordinates.

The measurement results are reported as follows:

• WMT700 reports WS (x, y) as two scalar speeds, one parallel to the N-S direction (x)and the other (y) parallel to the W-E direction.

x = -WS × cos (WD)y = -WS × sin (WD)

• WMT700 reports polar wind speed as a scalar speed in selected units (m/s, kt, mph,km/h).

Polar wind direction is expressed in degrees (°). WMT700 indicates the direction that thewind comes from. North is represented as 0°, East as 90°, South as 180°, and West as 270°.


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Figure 14 Wind Speed and Direction Presentations (Direction Offset Is 0)

More Information

‣ Analog Output Signal for Wind Speed Channel (page 21)

3.3 Wind Speed and Direction AveragingWMT700 provides average values for wind speed and direction using either scalar or vectoraveraging. With both methods, the average is determined according to the user-configurable averaging time. The averaging time affects serial communication and analogoutput similarly.

You can also configure the gust averaging time for calculating wind extreme values. Thedefault gust averaging interval is 3 seconds, as recommended by World MeteorologicalOrganization (WMO).

If you select scalar averaging, you can also enable wind direction coasting to ensureconsistent direction measurement results at low wind speeds.


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3.3.1 Scalar AveragingWhen you select scalar averaging, WMT700 calculates wind speed and direction averagesby adding up each wind measurement from the averaging time and dividing the sum by thenumber of measurements. The time between each consecutive wind speed and winddirection measurement is 0.25 seconds.

Wind direction is a circular function with a discontinuity at North, where 360° is equal to 0°.For example:

359° + 5° = + 4°0° - 5° = 355°

WMT700 translates wind direction to a linear function to determine the wind directionaverage. For example:

359° + 5° is translated to 364°, which is then further converted to +4° for output.

0° - 5° is translated to 355°.

This ensures that the wind direction average stays representative of the true situation even ifindividual samples occur on both sides of the zero direction.

If the data acquisition system requests data before the initial averaging time completes, thesensor returns the most recent complete measurement data.

The following figure shows an example of averaging wind direction when the measuredwind values are 355° and 10°. The resulting average is 2.5°.


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Figure 15 Example of Wind Direction Averaging

3.3.2 Wind Direction CoastingAccurate wind direction measurement requires that the wind speed is sufficient. If youenable wind direction coasting, WMT700 does not calculate wind direction when the windspeed drops below the selected wind direction coasting threshold. The last calculateddirection output remains until the wind speed increases enough to reach the threshold andWMT700 returns to normal operation.

3.3.3 Vector AveragingWhen you select vector averaging, WMT700 calculates wind speed and direction averagesby adding up each x velocity and y velocity measurement from the averaging time and thendividing the sum by the number of measurements. WMT700 converts the resultant averagex velocity and average y velocity to polar direction and magnitude, which returns the winddirection average in degrees and wind speed average in the chosen units.

If the data acquisition system requests data before the initial averaging time completes, thesensor returns the most recent complete measurement data.


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3.4 Measurement MethodsWMT700 measures wind speed and direction either continuously or for the duration of theuser-configurable averaging time. You can select the measurement mode over the serialinterface.

3.4.1 Continuous MeasurementYou can set WMT700 to measure wind data continuously and stop the measurement withthe STOP command.

The following data communication methods are available:

• Poll Mode: You can fetch the most recent data from WMT700 with the POLL command.You must specify the data message identification number in the command.

• Automatic Message Mode: If the automatic message interval is configured, WMT700sends automatic data messages at selected intervals. The data message is user-configurable.

More Information

‣ Serial Interface Timing (page 42)

3.4.2 Wind Measurement on RequestYou can set WMT700 to measure wind speed and direction for a specified period of time.The duration of the measurement can range from 0.25 seconds to 60 minutes, depending onthe configured averaging interval.

You can fetch the required data message from WMT700 in measurement mode with thepolling command. You must specify the data message in the command.

More Information

‣ Serial Interface Timing (page 42)

3.5 Host System Connections andInterfaces

WMT700 always needs a host device for measurement data collection and presentation. Thehost device is usually an automatic weather station, but other host devices such as dataloggers or personal computers can also be used.

WMT700 performs calculation, quality control, and data format procedures on themeasurement data. The processed data is sent to weather stations using serial ports and/oranalog output channels. The most commonly used communications interface is RS-485, butWMT700 has a flexible set of interfaces ranging from RS-232 to voltage and current modeanalog signals.


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You can set WMT700 to send measurement data either as analog output or data messagesthrough a serial port, or you can use both outputs simultaneously. You can send operatingand configuring commands to WMT700 through the serial interface.

Operation and heating power is usually provided from one power supply. You can also useseparate power supplies for heating and operation to prevent the heating function fromconsuming the operation power. In a split-supply system there can be a separate backuppower supply for the operating power supply.

The following figure shows the main software components and external interfaces ofWMT700.

Figure 16 WMT700 External Interfaces

More Information

‣ Typical System Environments (page 183)

3.6 Serial Communication and AnalogOutput

The following functionality is preconfigured at the factory according to your order:

• Digital communication interface for COM2• Digital communication profile for COM2• Digital communication units


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• Analog output signals for wind speed channel (AOUT1)• Analog output signals for wind direction channel (AOUT2)

3.7 Serial CommunicationIn WMT700, there are two serial communication ports:

• COM1: Service port (RS-485)• COM2: Configurable digital communication interface

Both ports support the same commands, protocols, operations, and data messages. You canuse any computer or data logger with a serial port to send commands to WMT700 and toreceive measurement data.

3.7.1 Communication InterfaceCOM1 is a fixed RS-485 communication interface to be used as a service port.

COM2 is a flexible digital communication interface that is preconfigured according to yourorder. The available options are:

• RS-232 (recommended up to 15 meter distance)• RS-485 (recommended up to 1200 meter distance in point-to-point connection)• RS-422 (recommended up to 1200 meter distance)• SDI-12 (recommended up to 60 meter distance)

Note that the recommendations depend on communication speed and cable type. Inoptimized environments even longer distances can be considered.

Regardless of the factory configuration, you can change the COM2 interface type by usingterminal software.

More Information

‣ Configuration Parameter Descriptions (page 187)‣ Wiring (page 72)

3.7.2 ProfilesThe digital communication profile is used to preconfigure WMT700 according to your orderat the factory. Depending on the preconfigured communication profile, the default settingsof the following parameters can be:

• Communication protocols• Communication parameters

The preconfigured communication profiles are:

• WMT700• ROSA - MES12• WS425 - ASCII• WS425 - NMEA Extended (version 0183)• WS425 - SDI-12 (version 1.3)


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• WS425 – ASOS

Vaisala recommends the WMT700 profile for normal operation. The profile offers a widerange of predefined and user-configurable data message formats, and it is developed forWMT700.

The ROSA - MES12 profile is intended for connecting WMT700 to the Vaisala ROSA system.

The WS425 profiles can be used when upgrading from WS425 to WMT700.

More Information

‣ Command Set for WMT700 (page 181)

3.7.3 ProtocolsIn addition to the protocols preconfigured under standard profiles, there are additionalprotocols available:

• WMT700• WMT700 NMEA MWV• SDI-12• WS425 - ASOS• WS425 - ASCII• WS425 - NMEA Standard• WS425 - WAT11• MES12

More Information

‣ Parameter Handling Commands (page 102)

3.7.4 Measurement and Configuration ModesThe serial ports have two operation modes:

• The configuration mode is for configuring WMT700 settings over a serial connection.The selected communication profile does not affect the available configurationcommands.

• The measurement mode is for operating WMT700. The available commands depend onthe selected profile. The port in the measurement mode can receive polling commandsand respond to them with data messages.

The following figure shows the configuration and measurement modes of both serial portsprovided by WMT700.


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Figure 17 Configuration and Measurement Modes

After power-up, WMT700 is in measurement mode.

More Information

‣ Command Set for WMT700 (page 181)‣ Entering and Exiting Configuration Mode (page 100)‣ OPEN — Entering Configuration Mode (page 100)‣ CLOSE — Exiting Configuration Mode (page 101)

3.7.5 Serial Interface TimingDepending on the selected interface, the serial data interface timing is as follows:


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• Interfaces RS-232, RS-485, RS-422: The figure below shows timing when WMT700 ispolled in the measurement mode.

Figure 18 Timing for RS-232, RS-485, and RS-422 Interfaces

The response delay t2 is user-configurable. In the configuration mode, some commandshave a longer response delay.

• SDI-12 interface: The timing is compliant with the SDI-12 standard. For the completeSDI-12 standard text, see www.sdi-12.org.

3.8 Analog OutputAnalog outputs are either enabled or disabled, and the output settings are preconfigured atthe factory according to your order. In analog output operation WMT700 takesmeasurements according to the configured averaging time and synthesizes the analogoutputs of wind speed and wind direction with an update interval of 0.25 seconds.

You can use configuration parameters to change the analog output type, WMT700 scalingor save power by disabling the analog output functionality.

WMT700 provides the following analog outputs:

• Aout1 for wind speed data• Aout2 for wind direction data

To emulate the WS425 analog output, choose voltage output, frequency output, andpotentiometer.

More Information

‣ Configuration Parameter Descriptions (page 187)‣ Operating WMT700 in WS425 Analog Output Mode (page 128)

3.8.1 Analog Output TypesAnalog output for Wind Speed (Aout1) can be configured as:

• Voltage output• Current output


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http://www.sdi-12.org

• Frequency output

• Push-pull output• Pull-down output• Pull-up output

Analog output for Wind Direction (Aout2) can be configured as:

• Voltage output• Current output• Potentiometer output

Figure 19 Frequency Output


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3.8.2 Analog Output ScalingYou can specify the transfer function between measured values and output analog values.You can select the analog output type as well as the gain and offset used in the transferfunction.

Table 18 Factory Settings for Analog Wind Speed Output

Aout1 Selected Option Scaling/Gain Offset ErrorIndication

Example

Voltage 0.1 V/m/s 0 V 10 V 0 V = 0 m/s

7.5 V = 75 m/s

Current 0 ... 20 mA 0.0002 A/m/s 0 A 0.022 A 0 mA = 0 m/s

15 mA = 75 m/s

Current 4 ... 20mA

WMT701 0.00040000 A/m/s 0.004 A 0.002 A 4 mA = 0 m/s

20 mA = 40 m/s

WMT702 0.00024615 A/m/s 0.004 A 0.002 A 4 mA = 0 m/s

20 mA = 65 m/s

WMT703 0.00021333 A/m/s 0.004 A 0.002 A 4 mA = 0 m/s

20 mA = 75 m/s

WMT704 0.00017777777 A/m/s 0.004 A 0.002 A 4 mA = 0 m/s

20 mA = 90 m/s

Frequency Push-Pull 10 Hz/m/s 0 Hz 1000 Hz 0 Hz = 0 m/s

750 Hz = 75 m/s

WS425 - voltage 8 mV/mph

(0.017895 V/m/s)

0 mph 2 V 0 mV = 0 mph

1.344 V=168 mph

WS425 - frequency 5 Hz/mph

(11.185 Hz/m/s)

0 mph 1000 Hz 0 Hz = 0 mph

840 Hz =168 mph

Frequency Push (PNP) 10 Hz/m/s 0 Hz 1000 Hz 0 Hz = 0 m/s

750 Hz = 75 m/s

Frequency Pull (NPN) 10 Hz/m/s 0 Hz 1000 Hz 0 Hz = 0 m/s

750 Hz = 75 m/s

Table 19 Factory Default Settings for Analog Wind Direction Output

Aout2 SelectedOption

Scaling/Gain Offset Error Indication Example

Voltage 0.02 V/° 0 V 10 V 0 V = 0°

7.2 V = 360°


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Aout2 SelectedOption

Scaling/Gain Offset Error Indication Example

Current 0 … 20 mA 0.00005 A/° 0 A 0.022 A 0 mA = 0°

18 mA = 360°

Current 4 … 20 mA 000044444 A/° 0.004 A 0.002 A 4 mA = 0°

20 mA = 360°

Potentiometer(WS425)

1/359*Vref /°

(0.0027855)

0 Vref

(1)

0 V = 0°

Vref = 359°

For a different scaling, change the gain and offset settings.

The scaling of the current output 4 … 20 mA depends on the sensor measurement range(WMT701, WMT702, WMT703, or WMT704), while the 0 … 20 mA output has 0.2 mA/m/sscaling for all the measurement ranges.

The following tables list the most common settings for different units.

Table 20 Common Transfer Function Settings for Aout1 (WS)

Output Signal Scaling/Units Setting for Gain Setting for Offset

Voltage 8 mV/mph

100 mV/m/s

0.017895

0.1

0

0

Current 0.2 mA/m/s 0.0002 0

Frequency 5 Hz/mph

10 Hz/m/s

11.185

10

0

WS425 - voltage 8 mV/mph 0.017895 0

WS425 - frequency 5 Hz/mph 11.185 0

Table 21 Common Transfer Function Settings for Aout2 (WD)

Output Signal Scaling/Units Setting for Gain Setting for Offset

Voltage 4 mV/°

20 mV/°

0.004

0.02

0

0

Current 50 uA/degree 0.00005 0

Potentiometer 359° = Aout ref 0.0027855 0


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You can configure output scaling or transfer function settings in a variety of ways bychanging the custom gain and offset. The basic measurement units are m/s and degrees.The physical output units are V, A, and Hz. For the potentiometer, an output of 1 means 100%of the Aout ref voltage.

The following formula illustrates the impact of gain and offset values on the producedoutput:

o = y0 + k×s

o Produced analog output (V, A, Hz, 100%)

s Measured wind speed or direction (in m/s or °)

k Selected gain value

y0 Selected offset value

Example

• Output mode: voltage• Offset: 0.0• Gain: 0.1

With the above settings, the analog output voltage range is from 0 V (0 m/s) to 7.5 V (75m/s). When the measured wind speed is 10 m/s, the output voltage is 1.0 V.

Output = 0.0 + 10 × 0.1 = 1.0 V

Example

• Output mode: current• Offset: 0.004• Gain: 0.0002

With the above settings, the analog output current range is 4 mA (0 m/s) ... 19 mA (75m/s). When the measured wind speed is 10 m/s, the output current is 6 mA.

Output = 0.004 + 10 × 0.0002 = 6.0 mA

3.8.3 Limitations for Output SignalsYou can specify the minimum and maximum values for analog output with the configurationparameters. The output is fixed to the specified values, and the unit depends on the selectedanalog output mode.


47

Example

To limit the output 1 in voltage mode to a range of 0.1 … 5 V, set the analog outputminimum value to 0.1 and the analog output maximum value to 5. Type the followingcommands:

S aout1minv,0.1 S aout1maxv,5

3.8.4 Missing Readings and Error IndicationIf WMT700 is unable to measure the wind, it indicates a missing reading in the output. Themost common reasons for measurement problems are foreign objects (such as ice, birds, orother foreign object) on the line of measurement or sound reflections from nearby objects(such as wind tunnel walls).

The default error indication is an out-of-range signal that is more than 10 V or 20 mA butother error settings can also be configured.

Example

To set analog output 1 error indication in voltage mode to 1 V, set the analog output errorvalue to 1. Use the following command:

S aout1err,1

More Information

‣ Configuration Parameter Descriptions (page 187)

3.9 Heating

To avoid injury, do not touch the heated parts of the wind sensor whenthe heating is enabled.WARNING!

WMT700 can include a heating functionality that ensures proper operation in coldenvironmental conditions or in cases where snow and ice build-up is possible.


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In addition to the standard non-heated version, WMT700 can be preconfigured at thefactory according to your order:

• Heating for the transducers only• Heating for both transducers and array arms• Heating for body, transducers, and array arms

Make sure that the supply output power capacity is high enough especially whentransducers, array arms, and sensor body are equipped with heaters. Also, note that thereare individual connections for applying the heating voltage.

3.9.1 Heated TransducersThe heating functionality has a thermostatic control with temperature sensors in eachtransducer. The control function keeps the transducer temperature above 0 °C and addsheating power when necessary. Therefore, heating is only activated when there is a risk ofice build-ups. If a sensor is blocked, WMT700 increases the heating power to melt the iceand returns to lower power after a period of time.

You cannot change the heating parameters, but you can enable or disable the heatingfunctionality with configuration parameters. When heating voltage falls below 18 VDC, analarm is raised. Heating is automatically disabled if heating voltage falls below 15 VDC.

Regardless of heating voltage, the maximum heating power is limited to 40 W and theaverage heating power is limited to 30 W. The maximum power control is achieved byautomatically sequencing the transducer heaters depending on a heating voltage. At lowheating voltages, all the transducers are heated simultaneously. At mid-range, two of thetransducers are heated. At high voltage end, a single transducer is heated at a time. A pulsewidth modulation (PWM) scheme is used to control the average heating power.

3.9.2 Heated Transducers and ArmsIn addition to heated transducers, the array arms can also be heated, which prevents icebuild-up on the arms.

The functional principle is the same as with the heated transducers only, but the maximumheating power is limited to 200 W and the average heating power is limited to 150 W.


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3.9.3 Heated Body, Transducers, and Arms

To avoid injury, do not touch the heated parts of the wind sensor whenthe heating is enabled.WARNING!

The fully heated version of WMT700 is suitable for harsh weather conditions. It providesheating for the sensor body, transducers, and arms.

The functional principle is the same with the heated transducers and arms. Body heating iscontrolled independently of transducer and arm heating. The maximum heating power forthe fully heated WMT700 is 350 W and the average heating power is 250 W in harshweather conditions. The inner temperature of the unit is measured continuously. If the innertemperature starts rising, body heating power automatically reduces to retain the optimuminner temperature of WMT700.


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4. Installation

4.1 Installing WMT700

To prevent corrosion and oxidation, use copper paste or equivalent on screws andconnector threads.

4.1.1 Maritime InstallationsIn maritime installations according to IEC 60945, WMT700 belongs to installation categoryC, which means that it is exposed to weather.

When making maritime installations, note the following:

• Do not install WMT700 near a magnetic compass. The compass safe distance is 5 m.• Do not place WMT700 directly in front of a radar.• Do not install WMT700 next to a powerful RF-transmitter antenna.

4.2 Placing WMT700Install WMT700 on one of the following:

• Side of the mast• Top of the mast• Sensor support arm or cross arm

To prevent equipment damage, install an air terminal so that the tip is ashigh above the instruments and sensors as possible.CAUTION!

When selecting the mounting position and routing the sensor cable, take into account theother equipment installed on the mast (for example, air terminals).

For the most reliable measurements:

• Avoid trees or other objects nearby which could disturb wind flow.• Install the sensor to the height that best represents the prevailing wind conditions on

site.

Chapter 4 – Installation

51

When deciding where to install the sensor, pay attention to the North arrow printed ontop of the sensor. The North arm is marked with an orange sticker.

If ice or snow accumulates on the mast, guy wires, or sensors, the ice orsnow can fall and cause injury to persons below.WARNING!

4.3 Unpacking and Handling WMT700WMT700 is shipped in a custom cardboard container with two plastic transportationdampers. When unpacking WMT700, remove only the bottom damper that protects thesensor body.

Never transport WMT700 without the custom shipping container.Otherwise, the warranty becomes void.CAUTION!


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Figure 20 Removing WMT700 BottomTransportation Damper

Do not remove the upper transportation damper that protects the arrayuntil you have installed the sensor.CAUTION!

Handle with care. Any impact on the instrument or sensor array may causedamage and lead to incorrect measurements.CAUTION!

Figure 21 Handling WMT700


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4.4 Connecting WMT700 CableWhen installing WMT700, route the cable according to the mounting option. Whenmounting to a mast, you can the route cable either outside or inside the mast. Cable routingdepends on the mast type and other equipment, such as air terminals, installed on the mast.

Make sure that you prepare or connect only de-energized wires.WARNING!

Do not perform installation or maintenance procedures when there is arisk of thunderstorm or lightning activity in the area.WARNING!

A long cable between units (sensors, transmitters, power supplies, anddisplays) can cause a lethal lightning-induced current surge. Always ground theenclosure to a suitable grounded location with a short, low-resistance cable.

WARNING!

Make sure that the cable is properly attached to the mast or cross armbefore starting the installation. Otherwise, it may slip and fall down during theinstallation procedure.

CAUTION!

To avoid strain on the connector, make sure you connect the cable properly.Too much strain may cause the cable to fall off, damage the cable or connector, or makethe cable or connector susceptible to water leakage.

CAUTION!


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The recommended minimum bending radius for the cable is 70 mm (2.76 in).

1. If you are using the cable tightening tool, insert the cable in the tool. Vaisala recommends that you use the cable tightening tool. The ribbed part of the tooloffers a better grip of the cable when tightening the connector. You do not need toremove the tool when the connector is tightened.

1 Cable tightening tool2 Cable

2. If you are not using the cable tightening tool, remove the mounting adapter from thesensor body, and lead the sensor cable through the mounting adapter.


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3. Connect the cable to WMT700. Tighten the cable by rotating the tightening tool or theribbed part of the connector clockwise by hand. Make sure that the connector isproperly tightened before proceeding to the next step.

1 WMT7002 Cable tightening tool3 Cable

Do not use tools when tightening the connector.CAUTION!

To avoid water leakage and damage to the sensor, verify that theconnector is properly tightened. If water leaks into the connector, this voids thewarranty for the sensor.

CAUTION!


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4. If you removed the mounting adapter, fasten it to the sensor by rotating the adapterclockwise. Tighten the three screws at the bottom of the sensor.

4.5 Mounting WMT700 on Vertical PoleMast

• 5-mm Allen key• Adjustable wrench

You can mount WMT700 on a 30‑mm (1.18‑in) or a 60‑mm (2.36‑in) pole mast. TheWMT70FIX mounting kit contains U bolts for both kinds of pole masts (2 pcs each).

You can place WMT700 either on the side or on top of the mast. When selecting themounting position, take into account:

• Other equipment installed on the mast (for example, air terminal)• Cable routing (inside or outside the mast)

1. Make sure that the cable is firmly connected to the sensor.


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2. Assemble the WMT70FIX mounting kit, and attach it to the mast with the U bolts.

Figure 22 Mounting WMT700 on Side of Mast

When mounting the sensor on the side of the mast, make sure that the mounting kitis positioned at the top level of the mast.

Figure 23 Mounting WMT700 on Top of Mast

3. Check that the mounting kit is level, and tighten the U bolts slightly.

Do not tighten the bolts too much at this stage. You still need to rotate the mountingkit to align the sensor after the installation.

4. Haul the sensor up.


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5. Holding the sensor from its body, run the cable through the WMT70FIX mounting kit,and slide the sensor into the mounting kit.


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6. To avoid misalignment, turn the sensor until the mounting screw reaches the far end ofthe slot, and tighten the screw. Tightening torque 5 Nm.

1 WMT700 mounting screw2 U-bolt and nut (M8 DIN934 A4) in horizontal slot

7. To align the sensor, rotate the mounting bracket.

More Information

‣ Aligning WMT700 (page 63)

4.6 Mounting WMT700 on SensorSupport Arm or Cross Arm UsingWMT70FIX

• 5-mm Allen key• Adjustable wrench

When mounting WMT700 on a horizontal sensor support arm or cross arm using theWMT70FIX mounting kit, place WMT700 with the array facing up or down.


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Mounting WMT700 with the array facing down protects the sensor better against theaccumulation of snow and interference from birds. The adapter drains located at the bottomof WMT700 prevent water from accumulating inside the mounting adapter.

1. Make sure that the cable is firmly connected to the sensor.

2. Attach the WMT70FIX mounting kit to the sensor support arm or cross arm with theU bolts and insert the U bolts in the slots of the mounting kit.

3. Check that the mounting kit is not tilted to either side and tighten the U bolts firmly.

4. Haul the sensor up.


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5. Holding the sensor from its body, run the cable through the mounting kit, and slide thesensor into the mounting kit.


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6. To avoid misalignment, turn the sensor until the screw reaches the far end of the slot,and tighten the screw.

1 WMT700 mounting screw. Tightening torque 5 Nm.2 U-bolt and nut (M8 DIN934 A4) in horizontal slot

7. Align the sensor.

If you installed the sensor with the array facing down, configure WMT700 accordingly.

More Information

‣ Aligning WMT700 (page 63)

4.7 Aligning WMT700

• 5-mm Allen key• Compass

WMT700 is permanently marked with the letter N and a North arrow. The North arm ismarked with an orange sticker.


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Figure 24 WMT700 North Arrow

Do not remove the instrument or sensor from the mounting kit during alignment.

1. Remove the transportation damper that protects the array and store it for future use.

2. To align the sensor, use a compass or other similar method to rotate the sensor so thatthe North arrow points North.

3. Tighten the bolts of the mounting kit. Tightening torque 5 Nm.

4. If you cannot align WMT700, measure the deviation angle from North and configurethe wind direction offset error.

Connect the cable to the data acquisition system and power supply.


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4.7.1 Configuring Wind Direction OffsetIf you cannot align the sensor so that the arrow points North, make a wind direction offsetby configuring the deviation angle in the sensor.

1. Mount the sensor to the desired position.

2. Define the deviation angle from the North (zero) alignment.

3. Type the wind message formatting command and the deviation angle SwndDirOffset,(angle). Indicate the direction from the North line with + or -.

The sensor transmits the wind direction data by using the changed zero alignment.

More Information


4.7.2 Analog Output Parameter for WMT700 in Tunnels andCranes

Analog outputs can be used in road and rail tunnel applications as well as crane applications.

You can get horizontal and direction data with the parameter aout_map. The aout_mapparameter defines how analog output signals are used. WMT700 provides the followinganalog outputs:

• aout1 for wind speed data• aout2 for wind direction data

Table 22 aout_map Values

Parameter Definition

0 aout1, wind speed

aout2, wind direction (default)


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Parameter Definition

1 aout1, North-South, x component

aout2, West-East, y component

Typically, only the component x is used.

2 aout1, wind speed

aout2, wind speed alarm

A digital output: hi when wind speed > aout2_0

The following table shows the relationship between polar representation and the x and yvector components.

Table 23 Wind y and x components at Different Wind Direction Angles

Wind Speed Wind Direction x Component y Component

1 0 -1 0

1 90 0 -1

1 180 1 0

1 270 0 1

4.7.2.1 Tunnel Application

In the tunnel application, airflow can be presented with one mA output channel, becauseairflow goes along the tunnel. Typically, a relatively long average time (time constant) forwind speed parameter is applied.

The sensor must be installed in a tunnel so that the sensor’s North is aligned with the tunnel.The Aout1 channel (x component) provides the airflow in the tunnel. The following figureshows a typical WMT700 installation in a tunnel.


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Figure 25 WMT700 in Tunnels

The following figure shows the 4…20 mA output as a function of airflow. The zero value is inthe middle of the output scale (12 mA). When airflow increases from 0 m/s towards North,mA output reduces from 12 mA linearly resulting in 4 mA with 20 m/s wind. Similarly, whenairflow increases from 0 m/s towards South, mA output increases from 12 mA linearlyresulting in 20 mA with 20 m/s wind.

Figure 26 mA Output in Tunnels


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The parameter aout_map with setting 1 is used to get the North-South component of wind.

s aout_map,1The North-South component to Aout1, the current output, -20 ... 20m/s to 4 … 20mA, Aout2disabled:

s aout1_g,0.0004 s aout1_o,0.012 saout1maxv,0.020s aout1minv,0.004s aout1mode,0s aout1err ,0.002 saout2mode,7

4.7.2.2 Crane Application

In the crane application, WMT700 can provide wind speed value and to drive alarm signalswith 2 mA output channels. The WMT00 alarm output signal can be connected to externalaudible or visible devices to trigger wind speed alarm for user-defined limits.

Two analog channels are required for this application:

• Channel 1 provides the wind speed value• Channel 2 provides the alarm signal

Figure 27 Analog Output for Wind Speed and Wind Speed Alarm

The wind speed value can be scaled according to the sensor’s measurement range. Thealarm signal operates with on/off-mode. The alarm threshold can be adjusted. The followingfigure shows the relation of outputs.


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Figure 28 mA Output in Cranes

The aout_map with setting 2 is for getting the wind speed value and the alarm signal. Thewind speed value in the Aout1 channel activates the wind speed alarm when the wind speedvalue exceeds the set limit value.

s aout_map,2The analog output 2 works as digital output. aout2_o sets the threshold wind speed(ws_tresh, unit [m/s]) to 20 m/s:

s aout2_o,20s aout2_g,1To invert the logic signal, type:

s aout2_g,-1.

aout1 gives wind speed 4 … 20 mA output. aout2 gives 0 mA when the wind speed is <20m/s, otherwise 20 mA.


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s aout_map,2s aout1_g,0.000044444s aout1_o,0.004s aout1maxv,0.020s aout1minv,0.004s aout1mode,0s aout1err ,0.002s aout2_g,1s aout2_o,20s aout2maxv,0.020s aout2minv,0.000s aout2mode,4s aout2err ,0.00

4.8 Installing Bird CageInstall the bird cage on top of the wind sensor.

In cold climates, take into account that accumulated snow or ice on the bird cage can disturbthe measurement. In such conditions, visit the site frequently to clear ice and snow build-up.

Make sure that you do not damage the WMT700 array when installing thebird cage.CAUTION!


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Figure 29 WMT700 Bird Cage and Bird Cage Straps

1 Bird cage2 Bird cage straps3 Wind sensor4 Guide for attaching the straps5 Latch for attaching the straps

1. Unpack the bird cage and the straps.

2. Position the bird cage on top of the wind sensor and press the kit down until the threehooks are in contact with the transducer arms.

3. Run the lower strap through the three guides in the kit.

4. Lift the latch screw, insert the strap to the latch, and press down the latch screw.

5. To tighten the screw, turn it clockwise with a screw driver or a socket. Do not over-tighten.

6. Run the upper strap through the three guides in the kit, and repeat step 4 and step 5for it.

4.8.1 Installing Bird NetIn areas with large populations of small birds, you can install a bird net over the bird cage.

1. Cover the bird cage with the bird net.

2. Tighten the bird net with cable ties.


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3. Cut off the excess net below the cable ties.

1 Bird net

4.9 WiringThe 17-pin M23 male connector is located at the bottom of WMT700. The connector is usedfor power supply, digital communications, and analog outputs. The signals related to digitalcommunications are galvanically separated from the ground. The connector type is Hummel7.106 series.

More Information

‣ Upgrading from WS425 to WMT700 (page 88)

4.9.1 CablesReady-made cables are available for use with Vaisala MAWS and AWS520 systems. Thesecables have connectors on both ends. There is also a retrofit cable for Vaisala ROSA systemin case analog output has been used with WS425.

Vaisala provides open-lead cables for connections to other host systems:

• Cable 2 m (227567SP)• Cable 10 m (227568SP)• RS485 Cable 2 m (228259SP)• RS485 Cable 10 m (228260SP)• ROSA Cable 10 m for Analog Outputs (231425SP)• Junction Box with Cable 2 m (ASM210719SP)

Cable 2 m and Cable 10 m carry through all signals from WMT700 while the RS-485 cablesare designed for RS-485 operation with a limited number of wires. The ROSA Cable isintended for replacing WS425 with WMT700 in the Vaisala ROSA system if WS425 isconnected using analog outputs. The Junction Box is designed mainly for maritime RS-422operation but it can be used whenever a connection longer than 10 meters is needed as anentry point for an extension cable.


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Wire colors in the tables are not applicable to other cables.

If there are unused wires, make sure that they are unconnected and protected. Do not cutoff any wires.

4.9.2 Cable 2 m, Cable 10 m, Cable 15 m, and Cable 26 mThe following table shows how to connect:

• Cable 2 m (227567SP)• Cable 10 m (227568SP)• Cable 15 m (237890SP)• Cable 26 m (237889SP)

Table 24 Connecting Cable 2 m, Cable 10 m, Cable 15 m, and Cable 26 m

Power Supply Wire Colors Pin

Operating Power Supply White 1

Operating Power Supply Ground Gray-Pink 11

Heater Power Supply Gray 5

Heater Power Supply Pink 6

Heater Power Supply Ground Blue 7

Heater Power Supply Ground Red 8

Enclosure Ground Shield Shield

Analog Outputs

Analog Output AOUT2, Wind Direction Brown 2

Analog Output AOUT1, Wind Speed White-Green 13

Reference Input for AOUT2 (simulated potentiometer) White-Gray 17

Analog Output Ground Red-Blue 12

COM port RS-232 RS-422 RS-485 SDI-12

COM2 RS232Rx Rx– Rx– - Green 3

RS232Tx Tx– Tx– Data Yellow 4

- Tx+ Tx+ - Brown-Green 14

- Rx+ Rx+ - White-Yellow 15

COM1 and COM2 Communication Ports Ground Violet 10


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COM1(ServicePort)

RS-485 – Black 9

RS-485 + Brown-Yellow 16

4.9.3 RS-485 for COM2 with Cable 2 m and 10 mIn the RS-485 mode, the same signals as in the RS-422 mode are available at the end ofCable 2 m and Cable 10 m. Make two-wire loop-backs at the end of the cable.

Figure 30 COM2 RS-485 Wiring

Table 25 COM2 RS-485 Wiring

WMT700 Signals Wire Colors Pin RS485 Signals

RxB Green 3 -

TxB Yellow 4

TxA Brown-Green 14 +

RxA White-Yellow 15

To avoid confusion, the RS-485 and RS-422 signals of WMT700 are named as follows:

• Inverting: –• Non-inverting: +

According to the EIA-485 standard, the lines are named as follows:

• Inverting: – <=> A• Non-inverting: + <=> B

The A/B naming used by some manufacturers is in conflict with the standard. To ensureproper operation, verify the polarity of the signals when using the device on the bus withsignals named as A/B. Opposite polarity causes data inversion on the bus, but it does notdamage the device.


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4.9.4 RS-485 Cable 2 m and RS-485 Cable 10 mRS-485 Cable 2 m and RS-485 Cable 10 m are designed for the standard connection:operating power, heater power, and RS-485. The two-wire RS-485 loopback connections arepreconnected inside the cable.

Table 26 Connecting RS-485 Cable 2 m (228259SP) and RS-485 Cable 10 m (228260SP)




Heater Power Supply Gray, Green, Pink 5, 6

Heater Power Supply Ground Blue, Black, Red, Yellow 7, 8


COM2

RS485 - Brown 3,4

RS485 + Red-Blue 14, 15

Communications Ground Violet 10

4.9.5 Connector SignalsThe following figure and table show the pin-out of the 17-pin M23 connector. The serialoutput type of COM2 depends on the sensor configuration. Analog outputs are alwaysavailable from the connector.

Figure 31 Pins for 17-Pin M23 Connector


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Table 27 Pin-Out for 17-Pin M23 Connector

Pin Description RS-232 RS-422 RS-485 SDI-12

1 Operating Power Supply

2 Analog output AOUT2, Wind Direction

3 COM2 RS232Rx Rx– Rx– -

4 RS232Tx Tx– Tx– Data

5 Heater Power Supply

6 Heater Power Supply

7 Heater Power Supply Ground

8 Heater Power Supply Ground

9 COM1 (ServicePort)

RS-485-

10 COM1 and COM2 Communication Ports Ground

11 Operating Power Supply Ground

12 Analog Output Ground

13 Analog Output AOUT1, Wind Speed

14 COM2 - Tx+ Tx+ -

15 - Rx+ Rx+ -

16 COM1 (Serviceport)

RS-485+

17 Reference Input for AOUT2 (simulated potentiometer)

Shield Enclosure Ground

4.10 PoweringWMT700 has separate power supply inputs for operating and heating power. The inputs areusually connected to the same 24 VDC power supply unit, but special applications such asbattery operation or battery back-up may require separate supplies.

The operating power has one supply terminal and one ground terminal, while the heatingpower has two supply terminals and two ground terminals allowing a higher supply current.All supply ground terminals are internally connected to each other.

In a system setup with two separate power supplies, avoid ground potential differencesbetween the supplies. Connect the negative terminals together if necessary.


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Some DC power supplies are based on a chopper circuit that operates at a 100 kHzfrequency. Avoid using such power supplies with WMT700. The measurement can bedistorted by the ripple in the DC output.

4.10.1 Operating PowerWMT700 can use any 9 ... 36 V (nominal voltage 24 V) minimum 2 W DC power supply thatmeets applicable safety regulations. Connect heating supply wires to the ground in caseheating is not used. The typical current and power consumptions vs. operating voltage areshown in the following figures. Note that the selected heating option affects the neededoperation voltage when separate powering for operation and heating is used.

Do not use a DC power supply based on a chopper circuit that operates at 100 kHz. Theripple in the DC output can distort the measurement.

Table 28 Operating Power Supply Voltage Requirements

Used Heating Option Operating Power Supply

Transducers 12 … 36 VDC 30 W

Transducers and arms 14 … 36 VDC 150 W

Transducers, arms, and body 16 … 36 VDC 250 W

Figure 32 Wiring of Non-heated WMT700 Versions


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In maritime environments, the normal input voltage ranges are: operating voltage10 … 30 VDC (-10% … +30%) and heating voltage 24 … 30 VDC (-10% … +30%), as definedin the maritime standard IEC 60945.

Figure 33 Operating Supply Current Consumption


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Figure 34 Operating Supply Power Consumption

More Information

‣ SLEEP — Enter Low-Power Mode (page 127)

4.10.2 Heating PowerThe following table shows the minimum power supply requirements of the WMT700 heatingoptions.

In maritime environments, the normal input voltage ranges are: operating voltage10 … 30 VDC (-10% … +30%) and heating voltage 24 … 30 VDC (-10% … +30%), as definedin the maritime standard IEC 60945.

Table 29 Heating Power Supply Requirements

Heating Option Heating Voltage Required Heating PowerSupply

None - -

Transducers 24 … 36 VDC 40 W

Transducers and arms 24 … 36 VDC 200 W

Transducers, arms and body 24 VDC 350 W (2 m cable)


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4.10.2.1 Power and Cable Recommendations for Fully Heated WMT700

The following table shows cable and power recommendations. If you need a longer than a 10meter cable, Vaisala recommends using Junction Box with Cable (WMT70CABLE12) forextending the cable length.

The minimum operation voltage for a fully heated WMT700 (transducers, arms, and bodyheated) is 16 V, if a separate power supply unit is used for operation.

Table 30 Heating Power and Extension Cable

Wire Type/Cable Length

2 mWMT70CABLE1)

10 mWMT70CABLE21)

20 m 30 m 40 m

0.5 mm2/AWG20

24V 400 W 28 V 400 W - - -

1 mm2/AWG17 - - 28V 400 W 30 V 400 W 32 V 400 W 2)

1.5 mm2/AWG15

- - - - 30 V 400 W

1) Vaisala standard connection cable2) Not for maritime use

The following figures illustrate the wiring of heated WMT700 instruments.

Figure 35 Wiring of Heated WMT700 Versions, Part 1


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Note that when using separate power supplies for operating and heating, the minus (-)terminals of the power supplies are connected together by an additional wire. Use aminimum 0.75 mm2 wire for connecting the (-) terminals together.

Figure 36 Wiring of Heated WMT700 Versions, Part 2

There are two terminals connected in parallel for both positive and negativerails of the heating voltage for the maximum current capacity. In case the connectioncable has parallel supply wires, they all have to be connected to ensure current capacity.Leaving one terminal unconnected or connecting it to the ground may cause a WMT700malfunction or a short circuit in the power supply.

CAUTION!

Always use cables that meet the minimum dimension requirements. Long cables with thinwires cause power losses in the cable and significantly decrease the heating capabilities ofWMT700. Loop resistance of 0.15 Ω results in approximately 1 V drop in heating voltagewith 200 W heating. You should note this to get proper heating capability. For example,the loop resistance of a 10 m cable (227568SP) is 0.7 Ω resulting in an approximately 4 Vdrop. It is recommended that you use at least a 28 V supply for the maximum heatingcapability.

4.10.2.2 Maximum Peak Power

The heaPeakPwr parameter sets WMT700 maximum peak power (in Watts). WMT700 has3 heater resistors for each arm. The heaPeakPwr parameter determines how manyresistors are on at the same time. WMT700 measures the supply voltage and calculates themaximum allowed number of heaters from the supply voltage and heater resistance. TheheaPeakPwr parameter does not limit the power in the body heater of a heated version ofWMT700.

Make sure the WMT700 power peak limit is lower than the power supply rating. SettingheaPeakPwr value too low reduces heating performance.


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Use a power supply that has enough power for WMT700. Part of the power is dissipated inthe cables.

Table 31 Sensor Power of Different Heating Options

Heating Option Required Sensor Power Parameter Values

Transducers 40 W 0 ... 40

Transducers and arms 200 W 0 ... 200

Transducers, arms, and body 350 W 0 ... 350

4.10.2.3 Body Heating Power Adjustment

The heaBMaxPower parameter sets WMT700 maximum body heater power (in Watts).

You can disable WMT700 body heating by setting the heaBMaxPower parameter value to0. The default value is 150.

Table 32 heaBMaxPower Parameter Values

Body Heating Parameter Value

Off 0

On 150

4.11 Upgrade from WS425 to WMT700When upgrading to WMT700, there are the following installation options:

• Basic installation, which consists of mounting WMT700 with the FIX70 mounting kitand the WMT700 mounting adapter.Uninstall the WS425 wind sensor and mounting kit. and follow the installationinstructions in 4.1 Installing WMT700 (page 51).

• Retrofit installation, which consists of mounting WMT700 with a WS425 mounting kitand the WMT700 mounting adapter for FIX30/60.

At the measurement site, mount WMT700 and connect it to the power source and dataacquisition system.

After upgrading to WMT700, you can install the optional bird prevention kit available for thewind sensor.


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To protect personnel and the wind sensor, install an air terminal with thetip at least one meter above WMT700. The air terminal must be properly grounded,compliant with all local applicable safety regulations. Do not install the wind sensorabove the top of the air terminal.

WARNING!



Save the container and all the packaging materials for future transporting or shipping.

4.11.1 Mounting with WS425 Mounting KitYou can mount WMT700 either on a vertical pole mast or a horizontal cross arm using theWS425 mounting kit. The procedure for both mounting options is identical. Typically youcan upgrade from WS425 to WMT700 without removing the mounting kit.

If you remove the mounting kit, you must align the wind sensor after mounting. Tofacilitate the aligning process, mark both the wind sensor and the mounting kit with amarker pen before removing the mounting kit. You can use the mark as a rough referencewhen starting the aligning process described in 4.7 Aligning WMT700 (page 63).

When mounting WMT700 to a cross arm, the wind sensor can be placed with the arrayfacing up or down. If the wind sensor is installed with the array facing down, you mustconfigure WMT700 accordingly. See 5.3 Configuration (page 101).


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The following figure shows the mounting procedure to a vertical pole mast.

Figure 37 Retrofit Installation to Pole Mast

1 WMT7002 Mounting adapter for FIX30/603 Mounting screw4 WS425 mounting kit


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The following figure shows the mounting procedure to a horizontal cross arm.

Figure 38 Retrofit Installation to Cross Arm with Array Facing Up

1 WMT7002 Mounting adapter for FIX30/603 Mounting screw4 WS425 mounting kit


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Figure 39 Retrofit Installation to Cross Arm with Array Facing Down

1 Mounting adapter for FIX30/602 WS425 cross arm3 WMT700

4.11.2 Upgrade PrerequisitesYou need the following components:


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• Correct mounting kit (already attached to the mast) for a retrofit installation. Thefollowing figure shows the available options: FIX30 and WS425FIX60 mounting kits.

Figure 40 FIX30, WS425FIX60-RST, and WS425FIX60-POM

• Correct mounting adapter for your installation: FIX30, WS425FIX60-POM, orWS425FIX60-POM. The diameter of the mounting adapter for the adapters is 61 mm.Change the mounting adapter if necessary. If you are not sure that you have the correctmounting adapter, contact Vaisala.

Figure 41 Mounting Adapter for FIX30, WS425FIX60 (Left), and Mounting Adapter forFIX70 (Right)

• Correct cables for the mounting kit and analog output/serial communication. The tablebelow lists the available cables for a retrofit installation. The In/Out stands for thepossibility to route the cable either inside or outside of the mast.

If you have FIX30, do not use the adapter cables but order the appropriate WMT700cable. The adapter cable does not fit inside the mast.


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Table 33 Mounting Kits and Cable Codes

Description Spare Part Item FIX70 FIX30 WS425FIX60

In Out In Out In Out

WMT700 cableswith open leads oneend (Standard 2 m/10 m/15 m/26 m,RS485 2 m/10 m,ROSA analog 10 m)

227567SP x x x x x

227568SP x x x x x

237890SP x x x x x

237889SP x x x x x

231425SP x x x x x

228259SP x x x x x

228260SP x x x x x

WMT700 cableswith connectors onboth ends (MAWS,AWS520):

227565SP x x x x x x

229807SP x x x x x

227566SP x x x x x

4.11.3 Upgrading from WS425 to WMT700

1. Uninstall WS425.

2. Depending on your cable type, do one of the following:

• Run a WMT700 cable through the WS425 mounting kit and connect it to WMT700.• If you use a WS425 cable, make sure the pre-installed O-ring seal sits properly in the

plastic male connector between the WS425 cable and the adapter cable. Connectthe WS425 cable to the WS425 adapter cable, run the adapter cable through theWS425 mounting kit, and connect the cable to WMT700.


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3. Tighten the connector by rotating the connector by hand clockwise.

Make sure that the connector is properly tightened before proceeding to the next step.If you cannot tighten the connector, loosen the mounting adapter fixing screws, removethe mounting adapter, and connect the cable. Reattach the mounting adapter.

4. Attach the WMT700 sensor body to the WS425 mounting kit and tighten the bolt.

5. Remove the transportation damper protecting the array and store it for future use.

6. Connect the cable to the data acquisition system and power supply. Vaisala recommends that you use the cable tightening tool. The ribbed part of the tooloffers a better grip of the cable when tightening the connector. Insert the cable in thecable tightening tool and rotate the ribbed part of the connector by hand. You canleave the connector in place.

1 WMT7002 Cable tightening tool3 Cable

7. Connect the wires. WMT700 is now ready for operation.

More Information

‣ Wiring (page 72)


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4.11.4 Mounting WMT700 with ASOS Mounting AdapterYou can mount WMT700 on your existing 425NWS installation kit (4258057) by using theASOS mounting adapter (ASM212140).

The following figure shows the parts of the installation.

Figure 42 Installing with ASOS MountingAdapter

1 WMT7002 Adapter for WMT700FIX, WMT700FIX-

POM, and WMT700FIX60-RST (228869)3 ASOS mounting adapter (ASM212140)4 425NWS sensor alignment adapter5 425NWS mounting tube

1. Remove the screw from the ASOS mounting adapter.


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2. Insert the ASOS mounting adapter into the WMT700 adapter (228869). The ASOSadapter slides into position.

1 Adapter for WMT700FIX,WMT700FIX-POM, andWMT700FIX60-RST (228869)

2 ASOS mounting adapter(ASM212140)

3. Rotate the adapter until the screw holes are aligned. Insert the screw and tighten it.


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4. Mount WMT700 with the ASOS mounting adapter on the existing sensor alignmentadapter.

1 WMT700 mounting adapter2 Existing 425NWS alignment adapter

5. Align the screw holes, insert the screw, and tighten it.

4.11.5 Connection Cable PrerequisitesWhen installing WMT700, pay attention to the following issues:

• How to route the cables of your mounting option. When mounting to a mast, the cablecan be routed either outside or inside the mast depending on the mast type and otherequipment, such as air terminals, installed to the mast.

• Make sure that the cable is properly attached to the mast or cross arm before startingthe installation. Otherwise, it may slip and fall down during the installation procedure.

• Make sure to attach the cable properly to avoid strain on the connector. Too much strainmay cause the cable to fall off, damage the cable or connector, or make the cable orconnector susceptible to leakage. The recommended minimum bending radius for thecable is 70 mm.


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Make sure that you prepare or connect only de-energized wires.WARNING!


A long cable between units (sensors, transmitters, power supplies, anddisplays) can cause a lethal lightning-induced current surge. Always ground theenclosure to a suitable grounded location with a short, low-resistance cable.

WARNING!

4.11.6 Wiring in Retrofit InstallationsThere are two ways of performing WMT700 retrofit installation:

• Using standard WMT700 cables• Using WS425 cables with adapters

To avoid unnecessary connectors and maximize long-term reliability, Vaisala recommendsthat you use the WMT700 cable for the retrofit installation.

4.11.6.1 Using Standard WMT700 Cables

This is the recommended way for the retrofit installation. There are various cables availablefor the installation:

• Cable 2 m (227567SP)• Cable 10 m (227568SP)• Cable 15 m (237890SP)• Cable 26 m (237889SP)• RS-485 Cable 2 m (228259SP)• RS-485 Cable 10 m (228260SP)• ROSA Cable 10 m for Analog Outputs (231425SP)• MAWS Cable 10 m (227565SP)• AWS520 Cable 10 m, Shield connected to PE pin (229807SP)• AWS520 Cable 10 m, Shield not connected to PE pin (227566SP)

4.11.6.1.1 ROSA Cable 10 m (Analog Outputs)

The ROSA Cable 10 m (231425SP) is intended for replacing WS425 with WMT700 in theVaisala ROSA system in case the WS425 has been connected using analog outputs. Thefollowing table shows the wire colors and related signals on WMT700.


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Note that there are serial port signals available for configuration purposes on the cable eventhough they are not used as operational. The unused wires must be properly isolated andterminated to avoid unwanted operation or failure.

Table 34 ROSA Cable 10 m (231425SP)




Heater Power Supply Gray 5

Heater Power Supply Pink 6

Heater Power Supply Ground Blue 7

Heater Power Supply Ground Red 8


Analog Outputs

Analog Output AOUT2, Wind Direction Brown 2

Analog Output AOUT1, Wind Speed White-Green 13

Reference Input for AOUT2 (simulated potentiometer) White-Gray 17

Analog Output Ground Red-Blue 12

COM port RS-232 RS-485

COM2 RS232Rx Rx- Green 3

RS232Tx Tx- Yellow 4

- Tx+ Brown-Green 14

- Rx+ White-Yellow 15

COM1 and COM2 Communication Ports Ground Violet 10

COM1(service port) RS-485, - Black 9

RS-485, + Brown-Yellow 16

4.11.6.2 Using WS425 Cables with Adapters

If a retrofit installation using WMT700 cables is not possible, there are adapters available formost situations.

• Adapter Cable for WS425 Serial (227569SP)• Adapter Cable for WS425 Analog Frequency Output (227570SP)• Adapter Cable for WS425 Analog Voltage Output (227571SP)

The adapter cable specifications in this section apply for both heated and non-heatedversions of WMT700.


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FIX30 is not compatible with adapter cables due to the small diameter of the mast.

4.11.6.2.1 Adapter Cable for WS425 Serial Output

The Adapter Cable for WS425 Serial (227569SP) can be used with the WS425 cablesZZ45203 and 010411.

The following table lists the adapter pin-outs and signal descriptions as they appear on theiruser guides for both WMT700 and WS425 connectors.

Table 35 Pin-Outs for WS425 Serial Adapter Cable (227569SP)

WMT700Connector Pin

WMT700 SignalDescription

WS425Connector Pin

WS425 SignalDescription

WS425Wire Color

1 Operating Power Supply 11 +12 VDC Brown

3 COM2: Rx-/ RS232RX 10 Data in (RxD) (R-) (RT-) Blue

4 COM2: Tx-/ RS232TX 9 Data out (TxD) (T‑) (RT-) Red

5 Heater Power Supply 16 +36 VDC Gray/Pink

7 Heater Power Supply Ground 3 GND Green

10 COM2: CommunicationsGround

8 GND Yellow

11 Operating Power SupplyGround

1 GND Black

14 COM2: Tx+ 12 Data out (T+) (RT+) White

15 COM2: Rx+ 14 Data in (R+) (RT+) Pink

The Adapter Cable for WS425 Serial (227569SP) does not support SDI-12 operation.

4.11.6.2.2 Adapter Cable for WS425 Analog Frequency Output

The Adapter Cable for WS425 Analog Frequency Output (227570SP) can be with theWS425 cable ZZ45204. The following table lists the adapter pin-outs and signaldescriptions as they appear on their user guides for both WMT700 and WS425 connectors.


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Table 36 Pin-Outs for WS425 Analog Frequency Output Adapter Cable

WMT700Connector Pin


WS425 ConnectorPin


WS425Wire Color

1 Operating PowerSupply

11 +12 VDC Brown

2 Analog Output AOUT2,Wind Direction

13 WD Vout Gray


7 Heater Power SupplyGround

3 GND Green

11 Operating PowerSupply Ground

1 GND Black

12 Analog Output Ground 8 GND Yellow

13 Analog Output AOUT1,Wind Speed

14 WS Fout Pink

17 Reference Input forAOUT2

12 WD Vref in White

4.11.6.2.3 Adapter Cable for WS425 Analog Voltage Output

The Adapter Cable for WS425 Analog Voltage Output (227571SP) can be used with theWS425 cable ZZ45204. The following table lists the adapter pin-outs and signaldescriptions as they appear on their user guides for both WMT700 and WS425 connectors.

Table 37 Pin-Outs for WS425 Analog Voltage Output Adapter Cable

WMT700Connector Pin


WS425 ConnectorPin


WS425 WireColor

1 Operating Power Supply 11 +12 VDC Brown


13 WD Vout Gray


7 Heater Power SupplyGround

3 GND Green

11 Operating Power SupplyGround

1 GND Black

12 Analog Output Ground 8 GND Yellow


15 WS Vout Violet


12 WD Vref in White


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4.11.6.3 WMT700 and WS425 Analog Output Signals

WMT700 pin connections differ from the connections of WS425 in that wind speed signaloutput, both voltage and frequency signals, appears on WMT700 pin 13.

WMT700 analog outputs must be configured according to the appropriate analog outputmode, which is either voltage, frequency, or potentiometer.

Table 38 WMT700 and WS425 Analog Output Connections

WMT700Connector Pin


Voltage Output WS425 Connector Pin, Wire Color


Voltage 15, Violet (connect pin 14 to ground)

Current not available

Frequency 14, Pink


Voltage 13, Gray

Current not available

Potentiometer 13, Gray


Potentiometer 12, White

12 Analog Output Ground All modes 1, Black (common with supplyground)

4.11.7 Powering in Retrofit InstallationsWMT700 is designed to operate with the same supply voltages as WS425 and noconnection changes are necessary. The power consumption depends on the selectedheating options. WMT700 with heated transducers can be used to replace similar WS425models. When upgrading from WS425 to WMT700 with heated transducers and arms, morecapacity is required from the power supply unit.

When WMT700 is in operation, the power consumption is higher than with WS425. Thiscan affect system performance in power-critical applications such as solar-powered orbattery-powered systems. Use solar-power or battery backup only to secure operatingvoltage. Make sure that the solar-powered system has a sufficient power reserve available.


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5. Operation

5.1 Communicating with TerminalSoftware

• PC with a serial port• Required cables for a serial connection• Any terminal software, such as Tera Term or Windows HyperTerminal

1. Connect a cable between your terminal computer, power supply, and WMT700.

2. Open the Windows HyperTerminal program.

3. Cancel the new connection.

4. Select File > Properties.

5. Select the correct COM port and Configure.

6. Set the communication parameters according to the configured port settings ofWMT700. WMT700 default values are:

• Bits per second: 9600• Data bits: 8• Parity: None• Stop bits: 1• Flow control: None

7. Select Apply > OK.

8. Select Settings > ASCII Setup > ASCII sending - Send line ends with line feed > OK.Click and close the New Connection Properties window.

9. Select View > Font and in the Font list, select Terminal.

10. Select Call > Call. Enter a name and select an icon for the connection. Select OK. When a serial line cable is connected to the PC and the terminal setup is correct, switchthe sensor power supply on. The following information is displayed to terminal screen:

WMT700 v<version number>

The sensor goes to measurement mode after four seconds and it is ready to receivemeasurement mode commands.

Chapter 5 – Operation

99

11. At the end of each command, press ENTER to execute the command. For a successfulexecution, the following combinations of Carriage Return <CR> and Line Feed <LF> areaccepted:<CR><LF><CR><LF>Communication baud rate can be configured from 300baud to 115200 baud.

More Information


5.2 Entering and Exiting ConfigurationMode

With the OPEN and CLOSE commands you can toggle between configuration mode andmeasurement mode. In the measurement mode, OPEN changes the mode to theconfiguration mode, and in the configuration mode, CLOSE changes the mode to themeasurement mode. Note that the configuration mode does not recognize the OPENcommand and the measurement mode does not recognize the CLOSE command.

5.2.1 OPEN — Entering Configuration ModeTo switch WMT700 from the measurement mode to the configuration mode, use the OPENcommand.

$0OPEN<enter>

$ Fixed $ character starts the command.

0 Sensor address. All sensors answer 0 address.

OPEN The OPEN command

<enter> To activate the command, press ENTER.

After a successful OPEN command the sensor switches from measurement mode toconfiguration mode and the following symbol is displayed:

>

If the port protocol is SDI-12, ("s comX_protocol,1"), use the command0OPEN<ENTER> without the $ character.


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5.2.2 CLOSE — Exiting Configuration ModeTo switch WMT700 from the configuration mode to the measurement mode, use the CLOSEcommand.

>CLOSE<enter>

> Configuration mode prompt

CLOSE The CLOSE command.

<enter> To activate the command, press ENTER.

5.3 Configuration

You have chosen the initial settings for WMT700 when placing the order. You can startusing WMT700 directly after the installation unless you want to check and/or change thesettings.

The initial settings have been configured at the factory according to your specificationswhen ordering the product.

You can configure WMT700 settings for serial communication or analog output withconfiguration commands using the serial port. Before starting configuration you must setthe port to the configuration mode. You can use one serial port in the configuration modewhile operating WMT700 from the other serial port.

WMT700 provides commands for:

• Parameter handling• Wind measurement control• Diagnostics• Information

If the messages parameter is set to 1 (response for parameter setting is enabled, see D.Configuration Parameter Descriptions (page 187)), WMT700 responds to an invalidcommand with an error message.

If the messages parameter is set to 0 (response for parameter setting is disabled), WMT700does not send any error messages. You can fetch the most recent error data in theconfiguration mode with the ERRORS command.

You can configure WMT700 by sending individual commands or by loading aconfiguration file to the sensor.


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Table 39 List of Configuration Mode Commands

Command Description

? Displays a list of configuration commands.

BAUD Changes or displays serial port settings.

CLEARERR Resets error counters.

CLOSE Switches the serial port to measurement mode.

ERRORS Fetches the error codes and counter information from WMT700.

G Displays either all or specified parameters.

H Displays a list of data messages and available values for measurement unit, profile, baudrate, interface, and analog output mode.

MEAS Starts wind measurement based on the user-configurable averaging time. WMT700 doesnot send data messages automatically.

POLL Tests data polling.

RESET Resets WMT700.

S Changes selected parameters or defines new data messages.

START Starts continuous measurement.

STOP Stops continuous measurement.

VERSION Displays the software version.

WIND_GET Fetches wind calibration information.

More Information

‣ ERRORS — Get Error Codes and Counts (page 106)‣ Ordering Options (page 18)‣ Restoring Serial Port Settings (page 170)

5.4 Parameter Handling CommandsAll the commands in the configuration mode are in the following form:

>CMD x,y<enter>

> Configuration mode prompt

CMD Command

Space

x Any parameter in Table 73 (page 187)


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, Comma

y Value of the parameter

<enter> Press ENTER to activate the command.

The parameter name and allowed parameter values depend on the command. For certaincommands they are optional. In the following command descriptions, WMT700configuration mode prompt and enter are left out for clarity.

5.4.1 S — Set ParameterThe S command defines new data messages and changes values of the WMT700parameters.

You can also use the S command to configure data messages.

If you try to set an invalid value for a parameter or an invalid item for a data message, theresponse depends on the messages parameter. If messages are enabled (messagesparameter is set to 1), WMT700 responds with an error message. If the messages parameterhas been set to 0, WMT700 does not send any response to set parameter command. Youcan also fetch the most recent error data in the configuration mode with the ERRORScommand.

Do not switch the power supply off immediately after the S command. Power must be onfor at least 5 seconds after the S command to save the updated parameters.

S x,y

x Any parameter in D. Configuration Parameter Descriptions (page 187).

y Value of the parameter

Example 1

In this example the baud rate is set to 2400 bps, parity to even, data bits to 8 bits, and stopbits to 1 bit. WMT700 needs to be RESET before the communication settings take place.

S com1_baud,2 S com1_parity,1 S com1_data,8 S com1_stop,1

You can also change or view the serial port settings with the BAUD command. With theBAUD command the communication settings take place immediately.


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Example 2

In this example the analog output 1 is set to send measurement data as a current signal, thegain is set to 1 mA/m/s and the offset to 4 mA.S aout1_o,0.004 S aout1_g,0.001 S aout1mode,0

Example 3

In this example both analog outputs are disabled to reduce power consumption.S aout1mode,3 S aout2mode,7

More Information

‣ Configuration Parameter Descriptions (page 187)‣ ERRORS — Get Error Codes and Counts (page 106)

5.4.2 G — Get ParameterThe G command shows the values of the configuration parameters. You can either display allparameter values or only certain values.

More Information


5.4.2.1 Get All Parameters

You can use the G command to view all parameter values if you do not specify anyparameters in the command.

G

5.4.2.2 Get Specified Parameters

You can use the G command to view specified parameter values.

G x

x Any parameter in D. Configuration Parameter Descriptions (page 187).

Example

In this example the averaging time is shown to be 4 seconds:

G wndAvgs wndAvg ,3.00000


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5.4.3 BAUD — Display or Set Port SettingsThis command shows or changes values of the serial port settings.

More Information

‣ Restoring Serial Port Settings (page 170)

5.4.3.1 Set Port Settings

You can use the BAUD command to change the bit rate, parity bit, data bits, stop bit, andcommunication profile of the selected serial port.

There is a 100 ms delay after which WMT700 takes the settings into use. Do not sendcommands to WMT700 during this time.

BAUD x,y,z,w

x Bit rate (300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200)

y Data bits (7 or 8)

z Parity (n = none, e = even, o = odd)

w Stop bits (1 or 2)

Example

The bit rate is set to 115200, data bits to 8, parity to none, and stop bits to 1:

BAUD 115200,8,n,1

5.4.3.2 Display Port Settings

You can use the BAUD command to display the current serial port settings.

BAUD


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5.5 Wind Measurement ControlCommands

5.5.1 MEAS — Single Wind MeasurementThis command starts wind measurement based on the user-configurable averaging time.WMT700 does not send the data message automatically. Use the polling command to fetchmeasurement data in the required data message format.

MEAS

5.5.2 START — Start Continuous MeasurementThis command starts continuous wind measurement. Continuous measurement starts whenyou exit the configuration mode or restart WMT700.

You can retrieve data with a polling command or configure WMT700 to send data messagesat selected intervals. You can set the interval for automatic messages with the autoIntparameter.

START

5.5.3 STOP — Stop Wind MeasurementThis command stops continuous wind measurement.

To restart measurement, use the MEAS or START command. You can fetch the most recentmeasurement data at any time with the polling command.

STOP

5.6 Diagnostics and Support Commands

5.6.1 ERRORS — Get Error Codes and CountsThis command fetches error information from WMT700.

ERRORS

The response:


106

a,b,c,d,e,f

a Number of events since latest reset

b Code for the first event since latest reset

c Code for the most recent event

d Number of errors since latest reset

e Code for the first error since latest reset

f Code for the most recent error

Example

1,3,3,10,13,13Interpretation of the example message:

• Number of events since latest reset: 1• Code for the first event since latest reset: 3• Code for the most recent event: 3• Number of errors since latest reset: 10• Code for the first error since latest reset: 13• Code for the most recent error: 13

If no errors or events have occurred yet, the response is the following:

0,0,0,0,0,0

More Information

‣ Error and Event Messages (page 169)

5.6.2 CLEARERR — Reset Error Codes and CountsThis command resets the error counters of WMT700.

CLEARERR

5.6.3 POLL — Get MessageThis command fetches the latest measurement data from WMT700. You need to specify thedata message format in the command.


107

Vaisala recommends that you only use this command for testing data connections. Tofetch measurement data for other purposes, switch the serial port to the measurementmode. The polling command in the measurement mode depends on the selected profile.

POLL y

y Identification number for the data message format.

More Information

‣ Data Messages (page 119)

5.6.4 RESET — Reset CPUThis command resets WMT700.

RESET

5.7 Information Commands

5.7.1 ? — Display Command SetThis command displays a list of available configuration commands.

?

5.7.2 H — Display Help and MessagesThis command displays a list of supported data messages and their identification numbersas well as the available values for wind speed measurement unit, profile, baud rate, interface,and analog output.

H

5.7.3 VERSION — Show Firmware VersionThis command displays the label and version of the WMT700 software.


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VERSION

5.7.4 WIND_GET — Get Calibration DataThis command fetches the WMT700 calibration date and other calibration data. Thisinformation is mostly intended for Vaisala technical support.

WIND_GET

5.8 Configuration ParametersA number of parameters affect WMT700 functionality.

To view and set parameter values, use the G and S commands.

You can configure WMT700 by sending individual commands or by loading aconfiguration file to the sensor.

In the automatic message mode, to initiate continuous measurement, use the STARTcommand.

More Information

‣ Configuration Parameter Descriptions (page 187)‣ Upgrading from WS425 to WMT700 (page 88)‣ Loading Settings from Configuration Files (page 115)‣ START — Start Continuous Measurement (page 106)

5.9 Configurable Data MessagesYou can define new data messages for automatic messaging or polling with the WMT700profile. Each item in a user-configurable data message string consists of 2 characters afterthe \ character. For example, the item for wind speed is \ws. The maximum number ofcharacters for a string is 80.

The characters are passed to messages as they are. All visible ASCII characters are allowed,except the available items for data message strings listed in Table 40 (page 110).


109

You can only use the user-configurable data messages with the WMT700 protocol.

More Information


5.9.1 Configuring Data MessagesAfter you have defined the new data message, you can test the message by polling it in theconfiguration mode. See 5.6.3 POLL — Get Message (page 107).

More Information

‣ POLL — Get Message (page 107)‣ START — Start Continuous Measurement (page 106)

5.9.1.1 Items for Data Messages

The user-configurable data messages can contain wind measurement, control character,check sum, and monitoring items. Configure new data messages with the msg1, msg2,msg3, and msg4 parameters. All available items are listed in the following tables.

Table 40 Wind Measurement Items for Data Messages

Item Description

\ad Address

\dm Wind direction minimum calculated over the averaging period

\dx Wind direction maximum calculated over the averaging period

\gu Wind gust speed

\lu Wind lull speed

\rg Signal quality

\st Speed of sound

\ts Sonic temperature

\tz 10 s average of sonic temperature

\va Validity of the measurement data. The available values are:1 = Valid wind measurementdata0 = Unable to measure

\w1 Wind direction when the peak speed (\wp) occurred

\wd Wind direction, average

\wm Wind speed minimum calculated over the averaging period

\wp Wind speed maximum calculated over the averaging period


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Item Description

\ws Wind speed, average

\wx Wind speed average, x component

\wy Wind speed average, y component

Table 41 Control Character

Item Description

\01 SOH (start of heading)

\02 STX (start of text)

\03 ETX (end of text)

\04 EOT (end of transmission)

\cr CR (carriage return)

\lf LF (line feed)

\se Checksum calculation end point

\sp Print checksum

\ss Checksum calculation start point

Table 42 Monitoring Items for Data Messages

Item Description

\er Status code. The code is a decimal number. Each bit corresponds to a status flag. For alist of the bits, see 5.9.2 Status Flags (page 113)

\fb 0 = No error

1 = Blocked sensor

\fh 0 = No error

1 = Heater failure. Incorrect heater resistance.

\fs 0 = No error

1 = Wind speed exceeds operating limits

2 = Sonic temperature exceeds operating limits

3 = Wind speed and sonic temperature exceed operating limits

\ft This value indicates temperature sensor failures when converted to binary format:

Bit 0 = Temperature sensor 1 failure




111

Item Description

\fv 0 = No error

1 = Supply voltage (Vh or Vi) too high

2 = Supply voltage (Vh or Vi) too low

\pa Average heating power

\ra Heater resistance

\ta Transducer temperature

\ti Internal temperature

\vh Heater voltage

\vi Supply voltage

Example

In this example a new data message with identification number 1 is defined. The itemsincluded in the message are average wind speed, average wind direction, and supplyvoltage. S msg1,$\ws,\wd,\vi\cr\lfWhen the above message is polled, WMT700 sends the following data if the averagewind speed is 5 m/s, the average wind direction is 128 degrees, and the supply voltage is23.4: $05.00,128,23.4<CR><LF>


112

Example

In this example the data message 2 is set to include the following items:

• SOH• Checksum calculation start point• Wind speed, average• Wind direction, average• Wind gust speed• Wind lull speed• Wind direction minimum• Wind direction maximum• Wind direction during the peak speed (wp) occurred• Checksum calculation end point• EOT• Print checksum• CR• LFS msg2,\01\ss$\ws,\wd,\gu,\lu,\dm,\dx,\w1\se\04\sp\cr\lf

WMT700 sends the following message that starts with the SOH character which isexcluded from the checksum. The checksum ends before the EOT character. Thechecksum (in this case, D8) is printed after the EOT character.

_$02.66,98.21,02.66,02.60,95.68,99.53,99.34_D8<CR><LF>The non-printable characters are shown above as and <CR><LF>.

5.9.2 Status FlagsThe following list describes the status flags included in the data message when the statuscode item \er has been added to the message. Each bit corresponds to a specific status.

Status flags are coded in decimal number format. To extract each bit from the status code,the decimal number must be converted to binary format.

Table 43 Status

Bit Description

0 Temperature sensor 1 failure



3 Heater failure. Incorrect heater element resistance

4 Too high (Vh > 40 V or Vi > 40 V) supply voltage

5 Too low (Vh < 20 V or Vi < 10 V) supply voltage


113

Bit Description

6 Wind speed exceeds operating limits.

7 Sonic temperature exceeds operating limits.

8 Wind measurement fails over 80% of the averaging time. Reported wind is still correct.

9 Not used

10 Blocked sensor. Reported wind is still correct.

11 High noise level

12 Message received correctly. The value is always 1.

The status flags are set when an event is detected. The flags are cleared when a statusmessage is reported. To get the current situation, you must read the status message twice.The first status message shows all events since the last read. The second status messageshows the current situation.

Example


114

5.9.3 Loading Settings from Configuration FilesYou can configure configuration of WMT700 settings over the RS-485, RS-422, or RS-232interface using configuration files. You can send a text file containing the configurationsettings to the sensor with a terminal program, such as Tera Term or WindowsHyperTerminal.

1. Use the G command to fetch the current WMT700 parameters.

2. Disable error messages with the command S messages,03. Copy the values from the terminal program to a file. Remove the parameters you do not

want to change. Also remove the parameter “messages” to avoid switching messagingon during the transfer.

4. Clear the error counters with the command CLEARERR.

5. Send the file to WMT700 to change the settings.


115

6. To verify that the parameters are set correctly (the values are in the allowed range andall parameters are valid), read the error counters with the command ERRORS. If all values are valid, WMT700 sends the following response:

0,0,0,0

You can also use the G command to check that the parameters are set correctly.If the response for parameter setting is not disabled (as instructed in step 3) but themessages parameter is set to 1 instead, WMT700 responds to each S commandconfirming the new parameter values. If an error occurs during the configuration,WMT700 sends a response containing the error messages.

RS-485 is a half-duplex interface. If the RS-485 interface is used and response forparameter setting is enabled (messages parameter is set to 1), a simple terminalprogram cannot be used for loading parameters from file.

This configuration file contains all the WMT700 parameters that are user-configurable.For example:

S wndAvg,1.00000S wndUnit,0S wndDirOffset, 0.00000S wndOrientation,0S wndGustTime,3.00000S wndCover,4S wndVector,1S wndCoast,0.00000S autoInt,1.00000S autoSend,0S autoPort,1S com1_baud,4S com1_parity,0S com1_data,8S com1_stop,1S com1_protocol,0S com1_delay,20S com2_baud,4S com2_parity,0S com2_data,8S com2_stop,1S com2_protocol,0S com2_delay,20S com2_interf,0S sleepTime,5S startDelay,5S heaterOn,1.00000 S freqType,0S aout1_o,0.00000


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S aout1_g,1.00000S aout1minv,0.00000S aout1maxv,32000.0S aout1err,1000.00S aout1mode,3S aout2_g,1.00000S aout2_o,0.00000S aout2minv,0.00000S aout2maxv,32000.0S aout2err,1000.00S aout2mode,7S msg1,\ss$\ws,\wd,\se\sp\cr\lfS msg2,2S msg3,3S msg4,4S address,AS messages,1

More Information


5.10 Operating WMT700When WMT700 is installed and configured, you can start operating the wind sensor:

• To receive wind measurement data through a serial connection as data messages, useserial communication.

• If you use the WMT700 profile, see the following operating instructions.• If you use WS425 or SDI-12 profiles, see 5.17 Operating WMT700 with WS425 and

SDI-12 Profiles (page 133)• To receive wind measurement data as current, potentiometer, voltage, or frequency

output, use analog output.

For a complete list of the serial commands available for the WMT700 series wind sensors,see A. Command Set for WMT700 (page 181).

More Information

‣ Analog Output (page 43)‣ Operating WMT700 in WS425 Analog Output Mode (page 128)


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5.10.1 Operating WMT700 with Terminal Program

• PC with a serial port.• Required cables for serial connection. See 2.4.3 Cables (page 28).• Any terminal program, such as Tera Term or Windows HyperTerminal.





5. Select the correct COM port and select Configure.

6. Set the communication parameters according to the configured port settings ofWMT700. The default values for WMT700 are:

Bits per second 9600

Data bits 8

Parity None

Stop bits 1

Flow control None


8. Select Settings > ASCII setup > ASCII sending - Send line ends with line feed (optional) > OK. Close the New Connection Properties window.

9. Select View > Font > Terminal.

10. Select Call > Call. Enter a name and select an icon for the connection. Select OK.

11. Switch the sensor power supply on. The following information is displayed: WMT700v<version number>

12. Wait for 4 seconds. WMT700 enters measurement mode automatically.

13. To test the connection, enter configuration mode with the following command:$0OPEN<CR><LF>

14. Use the following command to return to measurement mode: CLOSE<CR><LF>You can now start operating WMT700. Note that WMT700 does not send data messagesautomatically unless configured to do so.

More Information

‣ Measurement Mode Commands (page 125)‣ Communicating with Terminal Software (page 99)‣ Data Messages (page 119)


118

5.10.2 Data MessagesThe data messages can contain measurement data calculated by WMT700 and informationon the status and properties of the wind sensor.

For the automatic message mode, you must set the following parameters:

• autoInt (defines the message send interval in seconds, 0.25 s resolution)• autoSend (0 = automatic message mode disabled, for available messages, see the

following table.• autoPort (defines where the message is sent: 1 = COM1, 2 = COM2)

When the WMT700 protocol is used, you can use either one of the predefined messageformats or user-configurable data message format.

The following table lists the data messages supported by WMT700. You need the datamessage numbers when you use the WMT700 protocol POLL command or the automaticmessage mode with any protocol.

Table 44 Data Messages

Data Message Number Description

WMT700 Data Messages

20 WMT700 NMEA MWV profile message that reports average wind speed anddirection.

21 WMT700 profile message that reports average wind speed and direction.

22 WMT700 profile message that reports wind speed in x and y components.

23 WMT700 profile message that reports wind speed and direction and self-diagnostics information.

24 WMT700 profile message that reports wind speed and direction and self-diagnostics information, and includes the checksum.

25 WMT700 profile message that reports wind measurement, sonic temperature, andstatus data, and includes the checksum.

27 ROSA - MES12 Standard profile message

WS425 and SDI-12 Messages

15 WS425 A/B NMEA Extended profile message

16 WS425 A/B ASCII profile message

17 WS425 A/B SDI-12 profile message for M command

18 WS425 A/B SDI-12 profile message for V command

19 WS425 A/B NMEA Standard profile message

32 WS425 A/B WAT11 profile message

User-Configurable Data Messages


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Data Message Number Description

1 Items defined by the user.

2

3

4

To select a data message when using polling, specify the corresponding data messageidentification number in the polling command.

To select a data message when using automatic messages, use the configurationparameters.

More Information

‣ Configuration Parameters (page 109)‣ POLL — Poll Data (page 127)

5.10.2.1 WMT700 Data Message 21

WMT700 Data Message 21 reports the wind speed and direction in the following format:

$\ws,\wd\cr\lf

$ Fixed text




\lf LF (line feed)

Example

$00.08,299.20<cr><lf>• Wind speed, average: 0.08 m/s• Wind direction, average: 299.2°


WMT700 Data Message 22 reports the wind speed in x and y components in the formatdescribed below:


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$\wx,\wy\cr\lf

$ Fixed text

\wx Wind speed average, x component

\wy Wind speed average, y component


\lf LF (line feed)

Example$-00.04,00.07<cr><lf>

Interpretation of the example message:

• Wind speed, average, x component: -0.04• Wind speed, average, y component: 0.07


WMT700 Data Message 23 reports wind measurement and self-diagnostics data in thefollowing format:

$\ws,\wd,\wp,\wm,\Ts,\vh,\vi,\ta,\er\cr\lf

$ Fixed text



\wp Wind speed, maximum

\wm Wind speed, minimum

\Ts Sonic temperature

\vh Heater voltage

\vi Supply voltage


\er Status code. The code is a decimal number. Each bit corresponds to a status flag. See 5.9.2Status Flags (page 113).



121

\lf LF (line feed)

$03.21,75.83,03.34,03.15,22.37,12.2,23.5,20.0,32<cr><lf>


WMT700 Data Message 24 reports wind measurement and self-diagnostics data. Thechecksum is included in the message. WMT700 calculates the checksum by applying 8‑bitXOR for all bytes between checksum calculation start point and end point. The result isprinted as a 2‑digit hexadecimal value.

\ss$\ws,\wd,\wp,\wm,\Ts,\vh,\vi,\ta,\er,\se\sp\cr\lf

\ss Checksum calculation start point, not shown in the message

$ Fixed text






\vh Heater voltage

\vi Supply voltage


\er Status code. The code is a decimal number. Each bit corresponds to a status flag.

\se Checksum calculation end point, not shown in the message

\sp Print checksum (to verify message integrity)

Example of WMT700 Data Message 24

$03.45,76.03,03.58,03.37,21.97,23.8,23.6,23.8,0,0B<cr><lf>

Interpretation :

• Wind speed, average: 3.45 m/s• Wind direction, average: 76.03°• Wind speed, maximum: 3.58 m/s• Wind speed, minimum: 3.37 m/s• Sonic temperature: 21.97 °C


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• Heater voltage: 23.8 V• Supply voltage: 23.6 V• Transducer temperature: 23.8 °C• Status code: 0• Checksum: D4

More Information

‣ Status Flags (page 113)


WMT700 Data Message 25 reports wind measurement, sonic temperature, and status data.The checksum is included in the message. WMT700 calculates the checksum by applying 8-bit XOR for all bytes between checksum calculation start point and end point. The result isprinted as a 2-digit hexadecimal value. The message is in the following format:

\ss$\ws,\wd,\wp,\wm,\Ts,\er,\se\sp\cr\lf

\ss Checksum calculation start point, not shown in the message

$ Fixed text






\er Status code. The code is a decimal number. Each bit corresponds to a status flag. See5.9.2 Status Flags (page 113).

\se Checksum calculation end point, not shown in the message

\sp Print checksum (to verify message integrity)


\lf LF (line feed)


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Example

$03.22,75.29,03.38,03.07,22.13,0,3E<cr><lf>Interpretation of the example message:

• Wind speed, average: 3.22 m/s• Wind direction, average: 75.29°• Wind speed, maximum: 3.38 m/s• Wind speed, minimum: 3.07 m/s• Sonic temperature: 22.13 °C• Status code: 0• Checksum: A4

5.10.2.6 ROSA - MES12 Data Message

The MES12 data message 12 is used in the ROSA Surface Analyzer for Roads and Runwayssystem. You can use this data message when WMT700 is connected to the Vaisala ROSAsystem.

This message contains sensor identifications (sids), corresponding data items, and thesynchronization characters SOH, STX, and ETX. The lines are ended by CR and LF characters.

5.10.3 Missing ReadingsIf WMT700 is not able to measure the wind, it indicates a missing reading in the output. Themost common reasons for measurement problems are ice, birds, or other foreign objects onthe line of measurement.

When the WMT700 profile is used, WMT700 indicates missing readings by showing 999 inthe data messages.

When the WMT700 Data Message 22 is polled, missing readings are indicated with thefollowing response:

$999.00,999.00<cr><lf>

5.10.4 Error IndicationWMT700 provides advanced self-diagnostics for monitoring the status of the wind sensorand the validity of the measurement data. You can use the diagnostics as follows:


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• WMT700 checks the status of the internal operational software at each reset byverifying the CRC checksum of the software. The software check is not madeperiodically; it is only made at each reset. If the checksum is incorrect, WMT700 doesnot start up. If the checksum is correct, WMT700 continues by calculating the CRCchecksum of the parameter memory. In case the parameter memory is corrupted, thesensor replies with the text Parameters crc error upon startup. In case theparameter memory checksum is correct, WMT700 replies with the text ready asshown in the example below.

>$WMT700 v<version number>ready.

• To check the status of the wind sensor, include the status code item \er in the datamessage. You need to convert the status code to a binary number to verify the status.An error code does not indicate that the wind data is invalid.

• To check that the wind data is valid, include the \va item in the data message.• To check other diagnostics-related data, include the required items in the data

message.

More Information

‣ Status Flags (page 113)‣ Items for Data Messages (page 110)‣ Command Set for WMT700 (page 181)

5.11 Measurement Mode CommandsThe available commands in the measurement mode depend on the selected profile.

For a list of serial commands available for all the communication profiles supported byWMT700, see A. Command Set for WMT700 (page 181).

More Information

‣ Command Set for WMT700 (page 181)‣ Operating WMT700 with WS425 and SDI-12 Profiles (page 133)

5.11.1 WMT700 Profile CommandsWhen you select the WMT700 profile, you can operate WMT700 with these commands. Inthe command descriptions, <CR> is an ASCII carriage return control character and <LF> isan ASCII line feed control character. You can send commands at any speed. The command isexecuted when end-of-line character is received.


125

Each measurement mode command must start with the user-configurable WMT700address. It can be any string of printable ASCII characters with the maximum length of 30characters. Characters <CR>, <LF>, and $ are not allowed. If you use 0 as the address in thecommand, WMT700 responds regardless of the configured address.

If you have enabled response for parameter setting (messages parameter is set to 1),WMT700 responds to an invalid command with an error message.

Table 45 Measurement Mode Commands

Command Description

$aMEAS Starts wind measurement in single measurement mode. The duration of themeasurement is based on the user-configurable averaging time.

$aOPEN Switches the serial port to configuration mode.

$aPOLL,y Fetches latest measurement data from WMT700.

$aSLEEP Switches WMT700 from normal operating mode to low-power mode.

$ Fixed text

a WMT700 address. If the value is 0, it refers to any WMT700 address.


5.11.1.1 MEAS — Start Measurement

This command starts wind measurement in single measurement mode based on the user-configurable averaging time. WMT700 does not send the data message automatically. Usethe polling command to fetch the measurement data in the required format.

$aMEAS<CR><LF>

$ Fixed text

a WMT700 address. If the value is 0, it refers to any WMT700 address

5.11.1.2 OPEN — Enter Configuration Mode

This command switches the serial port to the configuration mode.

$aOPEN<CR><LF>

$ Fixed text


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a WMT700 address. If the value is 0, it refers to any WMT700 address

WMT700 automatically returns to normal operating mode, if it does not receivecommands in two minutes, or if it detects multiple unrecognized commands.

5.11.1.3 POLL — Poll Data

This command fetches data from WMT700. You need to specify the data message number inthe polling command.

When WMT700 is in the low-power mode, it does not receive the first character in thecommand. You must send an extra character (space) before the polling command toreceive data.

$aPOLL,y<CR><LF>

$ Fixed text



Example

In this example WMT700 custom data message 1 is polled from WMT700.

$0POLL,1<CR><LF>

More Information


5.11.1.4 SLEEP — Enter Low-Power Mode

This command switches WMT700 from the normal operating mode to the low-power mode.WMT700 resumes normal operation after sleep period determined by the sleepTimeparameter has elapsed, or when a character is received on data port COM2. For moreinformation on the sleepTime parameter.

$aSLEEP<CR><LF>


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$ Fixed text


More Information

‣ Configuration Parameters (page 109)

5.11.2 ROSA - MES12 Profile CommandsWhen the ROSA - MES12 profile is selected, you can poll data in the MES12 data messageformat. This data message is used in the ROSA Surface Analyzer for Roads and Runwayssystem. You can use this data message when WMT700 is connected to the Vaisala ROSAsystem.

5.11.2.1 M 12 — Poll MES12 Data Message

This command fetches data from WMT700 in the MES12 data message format.

@a M 12<CR><LF>

@ Fixed text

a WMT700 address. The allowed range is from 0 to 99.

More Information

‣ ROSA - MES12 Data Message (page 124)

5.12 Operating WMT700 in WS425Analog Output Mode

5.12.1 Analog Output SettingsIn analog output operation WMT700 takes measurements according to the configuredaveraging time and synthesizes the analog outputs of wind speed and wind direction withan update interval of 0.25 seconds. The analog output signal type and range depend on theconfigured settings.

Normally, analog output is enabled and the output settings are preconfigured at the factoryaccording to your order. WMT700 can be operated using these settings directly after theinstallation. However, the analog output settings of WMT700 can be changed or the analogoutput functionality can be disabled at any time to save power over the serial interface.

When operating WMT700 in a system configured for WS425, you must configure the analogoutput settings according to the following table using the S command.


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Table 46 Required Parameters for WS425 Analog Output Operation Mode

ParameterName

Default Value Allowed Values Description of How to Emulate WS425

aout1err 1000 0 …. 32000 Set 1 for voltage output and 625 for frequencyoutput for similar operation as with WS425.

aout1_g 1 0 …. 100 Gain for AOUT1. Set 0.017895 for compatibilitywith WS425 voltage output. Set 11.18 forcompatibility with WS425 frequency output.

aout2_g 1 0 …. 100 Gain for AOUT2. Set 0.0027855 for compatibilitywith WS425 potentiometer output.

aout1mode 3 0 = Current

1 = Voltage

2 = Frequency

3 = Disabled

Analog output mode for AOUT1. Set 1 for WS425voltage output compatibility. 2 for WS425frequency output compatibility.


5 = Voltage

6 = Potentiometer

7 = Disabled

Analog output mode for AOUT2.Set 6 WS425potentiometer output compatibility.

aout1_oaout2_o

0 -10000 … 10000 Offset for AOUT1 and AOUT2.Set output offset to0.

More Information

‣ S — Set Parameter (page 103)

5.13 Wind Speed OutputIn a system configured for WS425, you can set WMT700 to measure wind speed and sendanalog output as frequency or voltage.

These sections describe WMT700 analog output:

• Settings are configured according to 5.12.1 Analog Output Settings (page 128).• Wires are connected according to 4.11.6.1.1 ROSA Cable 10 m (Analog Outputs)

(page 93).

5.13.1 FrequencyWhen frequency is selected as the wind speed analog output, WMT700 sends a pulsedsignal of 0 to 10 V with a frequency proportional to wind speed through AOUT1. Every mileper hour adds 5 Hz (WS425) to the frequency. In SI units, a change of 0.894 meters persecond adds 10 Hz to the frequency. A frequency counter is required to count the output inHz and the calculation that scales the result to appropriate units.

The following figure shows the frequency output when an adapter cable for analogfrequency output (227570SP) and a WS425 cable are used. With WMT700, the wind speedsignal appears at pin 14 (pink) of the adaptor cable.


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Figure 43 Wind Speed Frequency Analog Output with WS425 Cable and Adapter Cable forAnalog Frequency Output

5.13.2 VoltageWhen voltage is selected as the wind speed analog output, the output from WMT700 varieslinearly from 0 VDC at 0 miles per hour to 1 VDC at 125 miles per hour. In SI units, the voltagevaries linearly from 0 VDC at 0 meters per second to 1 VDC at 55.88 meters per second.

The following figure shows the voltage output when an adapter cable for voltage output(227571SP) and a WS425 cable are used. With WMT700, the wind speed signal appears atpin 15 (violet) of the adaptor cable. The violet wire must be connected to V read channel,and the pink wire must be connected to the analog ground.


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Figure 44 Wind Speed Voltage Analog Output with WS425 Cable and Adapter Cable forAnalog Voltage Output

5.14 Wind Direction OutputWhen wind direction is measured, WMT700 sends analog output as simulatedpotentiometer output voltage referred to as external reference voltage. The output is aproportional signal 0 ... 100 % of the reference voltage representing the wind direction. Thereference voltage must be in the range of 1.0 ... 4.0 VDC (WMS425) or 0 … 10 VDC(WMT700). The output is 0 VDC at zero degrees and increases to the reference voltage at359 degrees.

The following figure shows the output for wind direction. With WMT700, the wind directionsignal appears at pin 13 (gray) of the adapter cable.


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Figure 45 Wind Direction Voltage Output with WS425 Cable and Adapter Cable

5.15 Limitations for Output SignalsYou can specify the minimum and maximum values for analog output with the configurationparameters. The output is fixed to the specified values, and the unit depends on the selectedanalog output mode.

Example

To limit the output 1 in voltage mode to a range of 0.1 … 5 V, set the analog outputminimum value to 0.1 and the analog output maximum value to 5. Type the followingcommands:

S aout1minv,0.1 S aout1maxv,5

5.16 Missing Readings and ErrorIndication

If WMT700 is unable to measure the wind, it indicates a missing reading in the output. Themost common reasons for measurement problems are foreign objects (such as ice, birds, orother foreign object) on the line of measurement or sound reflections from nearby objects(such as wind tunnel walls).


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The default error indication is an out-of-range signal that is more than 10 V or 20 mA butother error settings can also be configured.

Example

To set analog output 1 error indication in voltage mode to 1 V, set the analog output errorvalue to 1. Use the following command:

S aout1err,1

More Information


5.17 Operating WMT700 with WS425 andSDI-12 Profiles

Each communication profile has its own section listing the configurable parameters and theavailable commands and data messages.

5.18 Communication ProfilesWMT700 supports the following communication profiles:

• WMT700• ROSA - MES12• WS425 - ASCII• WS425 - NMEA Extended (version 0183)• WS425 - SDI-12 (version 1.3)• WS425 - ASOS

The profile has been preconfigured at the factory according to your requirements specifiedwhen ordering WMT700. You can change the profile through the serial interface, ifnecessary.

5.18.1 Changing Communication ProfileThe communication profile and other settings have been configured at the factoryaccording your specifications. You can start using WMT700 directly after the installationwith these settings.

If you want to change the communication profile, you must change all parameters to matchthe new profile.


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5.19 Operating WMT700 with TerminalProgram

• PC with a serial port.• Required cables for serial connection. See 2.4.3 Cables (page 28).• Any terminal program, such as Tera Term or Windows HyperTerminal.





5. Select the correct COM port and select Configure.

6. Set the communication parameters according to the configured port settings ofWMT700. The default values for WMT700 are:

Bits per second 9600

Data bits 8

Parity None

Stop bits 1

Flow control None


8. Select Settings > ASCII setup > ASCII sending - Send line ends with line feed (optional) > OK. Close the New Connection Properties window.

9. Select View > Font > Terminal.

10. Select Call > Call. Enter a name and select an icon for the connection. Select OK.

11. Switch the sensor power supply on. The following information is displayed: WMT700v<version number>

12. Wait for 4 seconds. WMT700 enters measurement mode automatically.

13. To test the connection, enter configuration mode with the following command:$0OPEN<CR><LF>

14. Use the following command to return to measurement mode: CLOSE<CR><LF>You can now start operating WMT700. Note that WMT700 does not send data messagesautomatically unless configured to do so.


134

More Information

‣ Measurement Mode Commands (page 125)‣ Communicating with Terminal Software (page 99)‣ Data Messages (page 119)

5.20 Entering Configuration ModeThis command switches the serial port to configuration mode. The command works with anycommunication profile supported by WMT700.

$aOPEN<CR><LF>

$ Fixed text

a Value of the address parameter. If the value is 0, it refers to any WMT700 address

<CR> Carriage return

<LF> Line feed

5.21 F/G ASOS ProfileThe following table lists the configurable parameters and their allowed and default valuesfor the WS425 F/G ASOS profile.

Table 47 Configurable Parameters for WS425 F/G ASOS Profile

Parameter DefaultValue

Profile-Specific Allowed Values Description

autoSend 0 0 = Automatic messages disabled Automatic data message number.Selects the data message formatfor automatic messages

com1_protocol 0 1) 2 = WS425 F/G ASOS Profile for serial port COM1

com2_protocol 2 2 = WS425 F/G ASOS Profile for serial port COM2

com2_interf N/A 2) 0 = RS-485

1 = RS-422

3 = RS-232

Interface for serial port COM2

wndAvg 5 0.25 … 3600

Resolution: 0.25

Averaging time for windmeasurement in seconds

wndGustTime 3 0.25 … 3600

Resolution: 0.25

Averaging time for wind minimumand maximum in seconds


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wndOrientation 0 0 = Array facing up

1 = Array facing down

Orientation of the array of WMT700

wndUnit 0 2) 0 = Meters per second (m/s)

1 = Miles per hour (mph)

2 = Kilometers per hour (km/h)

3 = Knots (knot)

Wind speed unit

wndVector 0 0 = Scalar averaging Wind averaging method

1) The parameter has no protocol-specific default value. It is determined separately in the configuration code.2) Wind speed unit and COM2 digital communication interface are defined in the order form. Default setting may be any of the

allowed options, and it can be verified from the unit’s configuration code.

To start continuous measurement, use the START command.

To stop measurement, use the STOP command.

5.21.1 WS425 F/G ASOS CommandsWMT700 responds to each command with a fixed-length message. In the commanddescriptions, <CR> is an ASCII carriage return control character and <LF> is an ASCII linefeed control character.

When the WS425 F/G ASOS profile is selected, WMT700 only responds to upper casecharacters.

The following commands are available for operating WMT700 with the WS425 F/G ASOSprofile.

Table 48 WS425 F/G ASOS Commands

Command Description

WA Requests average wind speed and direction message.

WS Requests the verbose built-in test (BIT) results.

WT Requests the short response BIT results and status.

WD Reports the BIT status.

WF Returns a fixed pattern of data

The WA command is executed by the ASOS at an interval that ranges from 1 to 30 seconds.For the WA command, WMT700 responds to the ASOS interrogation poll within 250milliseconds of receiving the request.


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The following WS425 F/G ASOS commands cannot be used with WMT700: WB,WFIRMWARE, WJ, WR, WCAL, WH, WCDV, WSTK, WL, WM, WN, WSST, and WATE. You can onlyconfigure WMT700 in the configuration mode. For a list of configuration commands forWMT700, see 5.3 Configuration (page 101).

5.21.1.1 WA — Fetch Averaged Wind Speed and Direction

This command requests the averaged wind speed and direction message with peak winds.

WA <CR><LF>

The response to the WA command consists of the averaged wind speed and direction data,peak wind speed, and associated direction. The average wind speed is a scalar runningaverage of the fundamental 1-second interval wind speed measurement made by WMT700.

You can set the wind averaging time and gust time with the wndAvg and wndGustTimeparameters. Set the wndVector parameter to 0 to use scalar averaging.

The command also fetches the WMT700 status, the averaging time for average and peakwind speed and wind direction, and signal quality.

More Information

‣ WS425 F/G ASOS Data Message (page 140)

5.21.1.2 WS — Fetch Internal Diagnostics Information

This command requests the verbose Built-In Test (BIT) results.

WS<CR><LF>

The command gives a textual run down of the results of all Built-In Tests (BITs). In every line,except the bad reading counter, the pass/fail indication is given with the single character Por F. This is followed by the description of the measured parameter, which is followed by theactual measured value.

The Bad 1 second readings counter is a running total of the number of fundamental 1-secondreadings that the sensor flagged as bad. This number rolls over to zero after reaching thecount value of 65535. It is initialized to zero on each power-up or any other activity thatperforms a re-initialization of the sensor. The time measurement quality indices are given forpath numbers as follows:

• Path 0 is from south transducer to north transducer• Path 1 is from north transducer to south transducer• Path 2 is from north transducer to east transducer• Path 3 is from east transducer to north transducer• Path 4 is from east transducer to south transducer• Path 5 is from south transducer to east transducer


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A listing for the command response is given below with representative values.

<CR><LF>P Heater voltage 22.3 Volts <CR><LF>P Array heater resistance 4.9 Ohms <CR><LF>P Heaters off voltage 0.1 Volts <CR><LF>P Incoming supply voltage 12.2 Volts <CR><LF>P 5.0 volt supply 5.05 Volts <CR><LF>P 10 volt supply 10.2 Volts <CR><LF>- Bad 1 second reading counter 0 <CR><LF>P Path 0 signal quality index 99 <CR><LF>P Path 1 signal quality index 99 <CR><LF>P Path 2 signal quality index 99 <CR><LF>P Path 3 signal quality index 99 <CR><LF>P Path 4 signal quality index 99 <CR><LF>P Path 5 signal quality index 99 <CR><LF>

The test limits for the various tests are as listed below:

• Heater voltage good in range 18.0 to 26.0 V• Array heater resistance good in range 4.0 to 6.0 Ω• Heaters off voltage good if below 0.5 V• Incoming supply voltage good in range 10.5 to 13.5 V• 5.0 V supply good in range 4.5 to 5.5 V• 10 V supply good in range 9.0 to 11.0 V• Signal Quality Index good above 50

5.21.1.3 WT - Request Short Response BIT Results and Status

The command WT requests the short response built-in test (BIT) results and status. Thecommand format:

WT CR LF

The response:

Byte 1 STX start of text ASCII control character

Byte 2 W sensor ID

Byte 3 T command identifier

Byte 4 P or F for heater voltage pass or fail

Byte 5-8 XX.X format heater voltage (volts RMS)

Byte 9 P or F for array heater resistance pass or fail

Byte 10-12 X.X or XX. (format as required) for array heater resistance (ohms)

Byte 13 P or F for pass or fail on heater off voltage


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Byte 14-16 X.X format heater off voltage (volts RMS)

Byte 17 P or F for pass or fail thermistor temperature

Bytes 18-20 Thermistor temperature (degrees Celsius)

Byte 21 P or F for incoming supply voltage pass or fail

Byte 22-25 XX.X format incoming supply voltage (volts DC)

Byte 26 P or F for 5 volt supply pass or fail

Bytes 26-29 X.XX format 5 volt supply voltage (volts DC)

Byte 30 P or F for 10 volt supply pass or fail

Bytes 31-34 XX.X format 10 volt supply voltage (volts DC)

Byte 35 ASCII hyphen character (-)

Bytes 36-40 XXXXX format bad 1 second reading counter

Byte 41 P or F for path 0 Signal Quality Index pass or fail

Bytes 42-43 XX format path 0 Signal Quality Index











Bytes 59-60 XX hexadecimal ASCII for modulo 256 checksum for Character positions 2 through 58

Byte 61 ETX end of text ASCII control character

Byte 62 ASCII carriage return control character

Byte 63 ASCII line feed control character

5.21.1.4 WD - Report Status of Built-in Tests

The command WD reports the status of the built-in tests (BIT). The command offers aconcise report on the pass/fail status of all BITs. The command format is:

WD CR LF

The response:


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STX WD PPPPPPPPPPPP CS ETX CR LF

STX ASCII start of test control character (position 1)

WD Command identifier (positions 2,3)

P or F Pass/Fail for 12 built in tests specified in WS command above in the order shown in theWS command text (positions 4-15) except Thermistor temperature.

CS Modulo 256 hexadecimal checksum of all characters from position 2 through the last Por F (positions 16,17)

EXT ASCII end of text control character (position 18)

CR ASCII carriage return control character (position 19)

LF ASCII line feed control character (position 20)

5.21.1.5 WF - Return Fixed Pattern of Data

The WF command returns a fixed pattern of data. This command can be used to verify thecommunications link. The command format is:

WF CR LF

The data fields are fixed at the following values:

Status F

Wind direction 678

Peak wind direction 567

Wind averaging time 21

Peak wind averaging time 09

Wind speed 876.5

Peak wind speed 432.1

Example of WF output:

WFF6785672109876.5432.1K99xx

5.21.2 WS425 F/G ASOS Data MessageWMT700 responds to the WA command with a data message.


140

• The sensor status (byte 4) indicates the following:

• P (Pass) indicates that all diagnostic tests have passed and WMT700 is functioningnormally.

• F (Fail) indicates that one or more of the diagnostic tests have failed. You can thenrequest diagnostics and extended tests (WS) to further isolate the problem.

• H (Heater failure) indicates that the wind reading is valid but one or more built-inheater diagnostic tests have failed.

• When the status byte is F, the wind direction fields are set to 999 and the wind speedfields are set to 999.9 in the applicable sensor response messages.

• The signal quality (bytes 26-27) is a numeric value from 0 to 99 representing the dataquality of processed data samples during the averaging time.For example, a value of 99 signifies that all data samples were determined to be validand processed during the averaging time. If some samples were determined to be"missing", these samples were not processed and the reported signal quality is aproportional value less than 99.

• Bytes 28-29 are the modulo 256 hexadecimal checksum of the ASCII values calculatedfor bytes from 2 to 27.

Table 49 WS425 F/G ASOS Data Message

Byte Description

1 Start of text

2 Sensor ID

3 Command identifier

4 Sensor status:

• P = Pass• F = Fail• H = Heater failureFor further information, see notes 1 and 2.

5-7 Averaged wind direction (degrees)

8-10 Wind direction (degrees) @ peak wind speed

11-12 Averaging time for wind speed and direction

13-14 Averaging time for peak wind speed and direction (seconds)

15-19 Averaged wind speed

20-24 Peak wind speed since last WA command

25 Wind speed unit:

• M = Miles per hour• K = Knots• L = Kilometers per hour• T = Meters per second

26-27 Signal quality. For further information, see note 3.

28-29 Hex checksum. For further information, see note 4.


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Byte Description

30 End of text

31 Carriage return

32 Line feed

Example

WAP2131870503012.6014.7K99xxInterpretation of the example message:

• Sensor ID: W• Command identifier: A• Sensor status: P = pass• Averaged wind direction (degrees): 213• Wind direction (degrees) @ peak wind speed: 187• Averaging time for wind speed and direction: 05• Averaging time for peak wind speed and direction (seconds): 03• Averaged wind speed: 012.6• Peak wind speed since last WA command: 014.7• Wind speed units: K = knots• Signal quality: 99• Hex checksum (refer to note 4): xx

5.22 WS425 A/B NMEA Standard ProfileWhen the WS425 A/B NMEA Standard profile is configured, WMT700 sends messagesbased on the configured automatic message interval. There are no operating commandsavailable for the user.

The following table lists configurable parameters and their allowed and default values forthe WS425 A/B NMEA Standard profile

Table 50 Configurable Parameters for WS425 A/B NMEA Standard Profile



address 1 String with 1 character Address for WMT700

autoInt 1 0.25 ... 1000

Resolution: 0.25

Automatic message interval inseconds. Do not select a messageinterval that is shorter than thetime it takes to send a datamessage


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autoPort 1 1 = COM1 port

2 = COM2 port

Serial port to which WMT700sends automatic data messages

autoSend 0 0 = Automatic messages disabled

19 = NMEA automatic data message

Automatic data message number.Selects the data message formatfor automatic messages

com1_protocol 0 1) 4 = WS425 A/B NMEA Standard Profile for serial port COM1

com2_protocol 0 4 = WS425 A/B NMEA Standard Profile for serial port COM2


1 = RS-422

3 = RS-232


wndAvg 1 0.25 … 3600

Resolution: 0.25

Averaging time for windmeasurement in seconds



Orientation of the array ofWMT700

wndUnit 0 2) 0 = Meters per second

1 = Miles per hour

2 = Kilometers per hour

3 = Knots

Wind speed unit




5.22.1 WS425 A/B NMEA Standard Data MessageThe standard variable length, comma-separated, MWV wind message is defined by NMEA0183 V2.20 as follows:

$WIMWV,<dir>,<ref>,<spd>,<uni>,<sta>*<chk><CR><LF>

$WIMWV Fixed text

<dir> Wind angle: 0 to 359 degrees

<ref> Reference: R = Relative

<spd> Wind speed

<uni> Wind speed unit:

• K = Kilometers per hour• M = Meters per second• N = Knots


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<sta> Status:

• A = Data valid• V = Invalid data

* Fixed text

<chk> Checksum (8-bit XOR, excluding $ and *)

<CR> Carriage return code, ASCII 0DH

<LF> Line feed code, ASCII 0AH

When the NMEA Standard profile is selected, the autoInt parameter must have a non-zero value since no polling command is defined for this profile.

Missing Readings

If data is missing due to a measurement problem, the NMEA messages show V in the statusfield. Wind speed and wind direction fields are left empty.

5.23 WS425 NMEA Extended Profile(v. 0183)

When the WS425 A/B NMEA Extended profile is selected, you can set WMT700 to sendmessages based on the configured automatic message interval or poll data using the $WIPcommand.

Table 51 WS425 NMEA Extended Profile Parameter Descriptions

Parameter Default Value Profile-Specific Allowed Values Description

address A String with 1 character Address forWMT700

autoInt 1 0.25 ... 1000

Resolution: 0.25

Automatic messageinterval in seconds.Do not select amessage intervalthat is shorter thanthe time it takes tosend a datamessage


2 = COM2 port

Serial port to whichWMT700 sendsautomatic datamessages


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autoSend 15 0 = Automatic messages disabled

15 = NMEA automatic data message

Automatic datamessage number.Selects the datamessage format forautomaticmessages.

com1_protocol 0 1) 5 = WS425 A/B NMEA Extended Profile for serialport COM1

com2_protocol 5 5 = WS425 A/B NMEA Extended Profile for serialport COM2


1 = RS-422

3 = RS-232

Interface for serialport COM2

wndAvg 3 0.25 … 3600

Resolution: 0.25

Averaging time forwind measurementin seconds



Orientation of thearray of WMT700


1 = Miles per hour


3 = Knots

Wind speed unit

wndVector 0 0 = Scalar averaging Wind averagingmethod

1) COM1 service port is always by default 0 - WMT700 protocol. This can be changed using serial commands if COM1 is neededfor protocol-specific communication

2) Wind speed unit and COM2 digital communication interface are defined in the order form. Default setting may be any of theallowed options, and it can be verified from the unit’s configuration code.

5.23.1 WS425 A/B NMEA Extended CommandsThis command polls data from WMT700.

$WIP<id>Q,*<chk><CR><LF>

$WIP Fixed text

<id> Data ID; A … Z

Q Fixed text

* Fixed text



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To use WMT700 with the NMEA Extended profile, either set the autoSend parameter to0 to enable polling or define a fixed output interval with the autoInt parameter. If youare using automatic messages, the value for the autoSend parameter must be set to 15.

Table 52 Checksum Table

ID Character<id>

Checksum<chk>

Polling String

A 72 $WIPAQ,*72<CR><LF>

B 71 $WIPBQ,*71<CR><LF>

C 70 $WIPCQ,*70<CR><LF>

D 77 $WIPDQ,*77<CR><LF>

E 76 $WIPEQ,*76<CR><LF>

F 75 $WIPFQ,*75<CR><LF>

G 74 $WIPGQ,*74<CR><LF>

H 7B $WIPHQ,*7B<CR><LF>

I 7A $WIPIQ,*7A<CR><LF>

J 79 $WIPJQ,*79<CR><LF>

K 78 $WIPKQ,*78<CR><LF>

L 7F $WIPLQ,*7F<CR><LF>

M 7E $WIPMQ,*7E<CR><LF>

N 7D $WIPNQ,*7D<CR><LF>

O 7C $WIPOQ,*7C<CR><LF>

5.23.2 WS425 A/B NMEA Extended Data MessageWS425 A/B NMEA Extended data message is as follows:

$P<id>MWV,<dir>,<ref>,<spd>,<uni>,<sta>*<chk><CR><LF>

$P Fixed text

<id> Data ID; A … Z


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MWV Fixed text


<ref> Reference: R = relative

<spd> Wind speed

<uni> Wind speed unit:

K = Kilometers per hour

M = Meters per second

N = Knots

<sta> Status:

A = Valid data

V = Invalid data

* Fixed text




Missing Readings

If data is missing due to a measurement problem, the NMEA messages show "V" in thestatus field. Wind speed and wind direction fields are left empty.

5.24 WS425 A/B ASCII Profile

In Vaisala WINDCAP Ultrasonic Wind Sensor WS425 User's Guide, this profile was calledthe Handar mode.

The following table lists the configurable parameters and their allowed and default valuesfor the WS425 A/B ASCII Profile.



autoInt 1 0.25 ... 1000

Resolution: 0.25

Automatic message interval inseconds.

Do not select a message intervalthat is shorter than the time ittakes to send a data message.

autoPort 1 • 1= COM1 port• 2= COM2 port

Serial port to which WMT700sends automatic data messages.


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autoSend 0 0 = Automatic messages disabled Automatic data message number.Selects the data message formatfor automatic messages.

com1_protocol 0 1) 3 = WS425 A/B ASCII Profile for serial port COM1

com2_protocol 3 3 = WS425 A/B ASCII Profile for serial port COM2

com2_interf N/A 2) • 0 = RS-485• 1 = RS-422• 3 = RS-232


wndOrientation 0 • 0 = Array facing up• 1 = Array facing down

Orientation of the array ofWMT700

wndUnit 0 2) • 0 = Meters per second• 1 = Miles per hour• 2 = Kilometers per hour• 3 = Knots

Wind speed unit




5.24.1 WS425 A/B ASCII CommandsThe following commands are available for operating WMT700 with the WS425 A/B ASCIIprofile.

Table 53 WS425 A/B ASCII Commands

Command Description

I Requests identification information for WMT700.

Wx Starts measurement based on averaging time and fetches the data.

You cannot use the WS425 A/B ASCII command Measurement Unit Change Ux withWMT700. For a list of configuration commands for WMT700, see A. Command Set forWMT700 (page 181).

5.24.1.1 I — Identify Sensor

This command shows the vendor, model number, and version information of WMT700.

I


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VAISALA WMT700 200

5.24.1.2 Wx — Start Measurement

This command starts wind measurement based on averaging time and fetches the dataautomatically when the measurement has finished. You must specify the averaging time inthe command.

The averaging time supplied in the command (x) sets the averaging time for WMT700.When you change the averaging time, it applies to the next new wind value.

Wx

x Time for averaging wind speed and wind direction. The range is from 1 to 9

WMT700 responds to the Wx command with a 19-character fixed-length data message.

Character Description

1 02H (<STX>, start of transmission)

2 W

3 Averaging in seconds

4 Status: P = Pass F = Fail

5 Wind direction (most significant digit)

6 Wind direction (middle digit)

7 Wind direction (least significant digit)

8 Wind speed (most significant digit)

9 Wind speed (next digit)

10 Wind speed (next digit)

11 Wind speed (least significant digit)

12 . (dot character)

13 Wind speed (tenth digit)

14 Wind speed unit:

M = Miles per hour

K = Knots

L = Kilometers per hour

T = Meters per second


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Character Description

15 Checksum (most significant digit). For more information, see the note below.

16 Checksum (least significant digit)

17 03H (<ETX>, end of transmission)

18 CR (carriage return)

19 LF (line feed)

The checksum is calculated from the characters from position 2 to 14. The accumulatorinitializes at 0 with the addition of the byte value. The checksum has a range of 0H … FFH.

ExampleW5 W5P1200013.2TDE


• 02H (<STX>, start of transmission)• Sensor ID: W• Averaging in seconds: 5• Sensor status: P = pass• Wind direction: 120• Wind speed: 0013• . (dot character)• Wind speed unit: T = meters per second• Checksum (most significant digit): D• Checksum (least significant digit): E• 03H (<ETX>, end of transmission)

Missing Readings

If data is missing due to a measurement problem, the WS425 A/B ASCII message reports999.9 for wind speed.

5.25 WS425 A/B WAT11 ProfileThe following table lists the configurable parameters and their allowed and default valuesfor the WS425 A/B WAT11 profile.


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Table 54 Configurable Parameters for WS425 A/B WAT11 Profile


com1_protocol 0 1) 6 = WS425 A/B WAT11 Profile for serial port COM1

com2_protocol 0 6 = WS425 A/B WAT11 Profile for serial port COM2

1) The parameter has no protocol-specific default value. It is determined separately in the configuration code.

5.25.1 WS425 A/B WAT11 CommandsWhen the WS425 A/B WAT11 profile is selected, you can poll data using the followingcommand:

<esc><id>

<esc> Escape character ASCII 27H

<id> WMT700 ID, for example, A

Response:

<stx><id><spd><dir>

<stx> Start of text character (1 digit)

<id> WMT700 identification character, for example, A (1 digit)

<spd> Wind speed (in meters per second) multiplied by 10. For example, 045 is 4.5 meters persecond (3 digits).

<dir> Wind direction with two octal numbers for 6-bit binary data, for example, 73corresponds to (7×8+3)/64×360 = 332 degrees

Missing Reading

The WS425 A/B WAT11 message reports missing data as slashes (/////).

5.26 SDI-12 Profile (v 1.3)SDI-12 is a standard for interfacing data recorders with microprocessor-based sensors. Thename stands for serial/digital interface at 1200 baud.

The SDI-12 Support Group is an association of companies that produce and use SDI-12products with the purpose of reviewing requests to enhance, clarify, or modify the SDI-12architecture and that votes on proposed changes to SDI-12.


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For the complete SDI-12 standard text and information on the SDI-12 Support Group, see theSDI-12 web-site: www.sdi-12.org.

SDI-12 sub-modes A and B are not supported by WMT700.

When establishing the terminal connection to WMT700, set the following communicationsettings for the SDI-12 profile:

• Bits per second: 1200• Data bits: 7• Parity: 1• Stop bits: 1• Flow Control: None

The following table lists the configurable parameters and their allowed and default valuesfor the SDI-12 profile.

Table 55 Configurable Parameters


Profile-Specific AllowedValues

Description

address 1 1, 2, 3, 4, 5, 6, 7, 8, 9 Address for WMT700


2 = COM2 port

Serial port to which WMT700 sendsautomatic data messages

autoSend 0 0 = Automatic messagesdisabled

Automatic data message number. Selectsthe data message format for automaticmessages.

com1_protocol 0 1) 1 = SDI-12 Profile for serial port COM1

com2_baud 1 1 = 1200 Baud rate for serial port COM2.

Changes take effect only after reset or theRESET command.

Note that low bit rate can affectmeasurement timing, if WMT700 cannotsend the data message before newmeasurement starts.

com2_data 7 7 = 7 data bits Data bits for serial port COM2.


com2_interf 0 2) 2 = SDI-12 Interface for serial port COM2


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http://http://www.sdi-12.org



Description

com2_parity 1 1 = Even Parity for serial port COM2.


com2_protocol 1 1 = SDI-12 Profile for serial port COM2

com2_stop 1 1 = 1 bit Stop bits for serial port COM2.

Changes take effect only after reset or theRESET command

wndAvg 1 0.25 … 3600

Resolution: 0.25

Averaging time for wind measurement inseconds





1 = Miles per hour


3 = Knots

Wind speed unit




To start continuous measurement, use the START command. To stop measurement, use theSTOP command.

5.26.1 SDI-12 Commands

You can only use COM2 serial port for sending commands and receiving data messageswith the SDI-12 profile.

The following table lists the available commands for operating WMT700 with SDI-12 profile.

Table 56 SDI-12 Commands

Command Description

?! Queries WMT700 for its address.

a! Ensures that WMT700 is responding.

aI! Queries WMT700 for its SDI-12 compatibility level, model number, and firmware versionnumber.

aAb! Changes WMT700 address.


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Command Description

aC! Starts concurrent measurement.

aCC! Starts concurrent measurement with CRC calculation.

aD0! Fetches instant data from WMT700.

aM! Starts measurement.

aMC! Starts measurement with CRC calculation.

aV! Starts verification.

The following SDI-12 commands cannot be used with WMT700:

• Measurement Unit Change Command aXUx!• Heater Control Command aXHx!• Check Current Sub mode aX?!• Place Sensor in Sub mode B Command aXQx;c.c;n;yyyy!• Reset the Sensor to Sub mode A Command aXS!• Check Current Measurement Unit Command aX*!• Continuous Measurement aR0!

More Information

‣ Command Set for WMT700 (page 181)

5.26.1.1 ?! — Address Query

This command queries for the WMT700 address.

When you use a question mark (?) as the address character with the a! command, WMT700responds as if it was being addressed on the SDI-12 bus. Regardless of its address, WMT700responds to the command, which allows you to determine the address for the wind sensor.

If more than one WMT700 is connected to the bus, they all respond, causing a buscontention.

?!

? Wildcard

! Terminates the command

The response:


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a<CR><LF>

a Single-digit WMT700 address that corresponds to the first character of the addressvalue

<CR><LF> Terminates the response

5.26.1.2 a! — Acknowledge Active

This command ensures that WMT700 is responding to a data recorder or another SDI-12device. It asks WMT700 to acknowledge its presence on the SDI-12 bus.

a!



The response:

a<CR><LF>



1!1<CR><LF>

5.26.1.3 aAb! — Change Address

This command changes the WMT700 address. After WMT700 has received this commandand sent a response, the sensor does not respond to any other command for one second.This gives WMT700 time to write the new address to the non-volatile memory.

You can also change the WMT700 address by entering configuration mode and changingthe address parameter.


155

aAb!

a Current single-digit WMT700 address that corresponds to the first character of theaddress value

A Change address command

b New address


The response:

b<CR><LF>

b New single-digit WMT700 address (or the original address if WMT700 is unable tochange the address)


5.26.1.4 aC! — Start Concurrent Measurement

This command starts concurrent measurement. WMT700 does not return measurement dataafter this command. It sends a response that indicates when the measurement result can beretrieved using the aD0! command and the number of parameters.

aC!


C Start concurrent measurement command

! Terminates the command.

The response:

atttnn<CR><LF>



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ttt Period of time, in seconds, after which WMT700 has the measurement ready

nn Number of measurement values WMT700 calculates and returns as a response to one ormore subsequent aD0! commands

<CR><LF> Terminates the response.

1C! 100205<CR><LF>


• Time after which the measurement is ready: 2 seconds• Number of returned measurement values: 5

To fetch the measurement results, use the aD0! command.

5.26.1.5 aD0! — Send Data

This command fetches instant data from WMT700. aD0! must be preceded by a C!, M!, orV! command. WMT700 responds by sending measurement data (after C! or M!) orverification data (after V!).

In a SDI-12 system compliant with the standard, if the expected number of measurements isnot returned in response to an aD0! command, a data recorder issues D1!, D2!, and so on,until all measurement values are received. The expected number of measurements isincluded in the message that WMT700 sends in response to an aC!, aM! or aV! command.Multiple data requests are not needed with WMT700, since all return values fit in oneresponse string.

aD0!


D0 Send data command


More Information

‣ SDI-12 Data Messages (page 160)

5.26.1.6 aI! — Send Identification

This command queries WMT700 for its SDI-12 compatibility level, model number, andfirmware version number.


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aI!


I Send identification command


The response:

allccccccccmmmmmmvvvxxx . . . xxx<CR><LF>


11 SDI-12 version number, indicating SDI-12 version compatibility; for example, version 1.1 isencoded as 11

cccccccc 8-character vendor identification Vaisala

mmmmmm 6 characters specifying the model number of WMT700

vvv 3 characters specifying the firmware version 604

xxx ... xxx Optional field, up to 13 characters, used for a serial number or other specific WMT700information that is not relevant for operation of the data recorder (not used)


5.26.1.7 aM! — Start Measurement

This command starts measurement. WMT700 does not return measurement data after thiscommand. It sends a response that indicates when the measurement result can be retrievedusing the aD0! command and the number of parameters.

aM!


M Start measurement command

! Terminates the command.

The response:


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atttn<CR><LF>


ttt Period of time, in seconds, after which WMT700 has the measurement ready

n Number of measurement values WMT700 calculates and returns as a response to one ormore subsequent aD0! commands


Example1M! 10025<CR><LF>


• Time after which the measurement is ready: 2 seconds• Number of returned measurement values: 5


5.26.1.8 aV! — Start Verification

This command starts verification. However, WMT700 does not return verification datadirectly after this command. It sends a response that specifies when the verification resultscan be retrieved using the aD0! command and the number of parameters. The WMT700verification data includes a watchdog count, sensor measurement unit settings, and thecurrent SDI mode setting.

The command:

aV!


V Starts verification command


The response:

atttn<CR><LF>


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ttt Period of time, in seconds, after which WMT700 has the verification data ready

n Number of returned verification data fields


Example1V! 10014<CR><LF>


• Time when the measurement is ready: 1 second• Number of returned measurement values: 4


5.27 SDI-12 Data MessagesWhen the SDI-12 profile is selected, the data message sent by WMT700 depends on thecommand that you use before fetching the data with the aD0! command.

5.27.1 WS425 A/B SDI-12 Message for C and M CommandWhen you give the commands aC! or aM! followed by aD0!, the response is:

a<WS><WD><x><y><s><CR><LF>


<WS> Polar wind speed in selected units

Format: +(ss)s.s

<WD> Polar wind direction in degrees

Format: +(dd)d.d

<x> x component of wind speed in selected units

Format: ±(ss)s.s

<y> y component of wind speed in selected units

Format: ±(ss)s.s

<s> Static speed of sound in miles per hour

Format: ±(ss)s.s


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The above are measurement data fields.

Missing Readings

If data is missing due to a measurement problem (for example, blocked paths betweentransducers), the measurement data is replaced with 999.9.

ExampleExample of the command and response when data is missing:

7D0! 7+999.9+999.9+999.9+999.9+999.9 <CR><LF>

5.27.2 WS425 A/B SDI-12 Message for V CommandWhen you have given the commands aV! and aD0!, the response is the following:

a<watchdog><WS_unit><SDI-mode><spare><CR><LF>


<watchdog> Number of times the watchdog has triggered. Ideally should be zero. Format: +(c)c

<WS_unit> Wind speed unit. The options are:

• +0 = mph• +1 = kt• +2 = km/h• +3 = m/s

<SDI-mode> Current sub mode setting. The options are:

• +0 = SDI-12 sub mode A• +1 = SDI-12 sub mode B

<spare> 1 digit for factory use, format: +c


The above are verification data fields.

5.27.3 Requesting Cyclic Redundancy CheckError detection capability can be enhanced by using the aCC! or aMC! command to startthe measurement. These commands have the same function and send the same response ascommands aC! and aM! respectively. The difference is that Cyclic Redundancy Check isappended to the data returned by the aD0! command.


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The 16-bit Cyclic Redundancy Check value is appended to the response of the aD0!command before <CR><LF>. It is encoded as three ASCII characters using the followingalgorithm:

1st character=0x40 OR (CRC shifted right 12 bits)2nd character=0x40 OR ((CRC shifted right 6 bits) AND 0x3F)3rd character=0x40 OR (CRC AND 0x3F)

Example1MC! 10025<CR><LF> 1D0! 1+2.7+85.2-0.2-2.7+770.5CAH<CR><LF>


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6. Maintenance

6.1 WMT700 MaintenanceWMT700 is a very reliable and rugged sensor. Since no moving or consumable parts areused, only minimal periodic maintenance is required.

Periodic maintenance for WMT700 includes:

• Checking that the transducers are not bent, twisted, or rotated. All transducers must beparallel to each other. Damaged array may cause inaccurate readings.

• Checking that the transducers have not been scraped or touched with sharp objects.The silicon rubber coating must be undamaged. If the transducers or the coating isdamaged, send the sensor to Vaisala for repair.

• Verifying functionality by using the optional verifier to check the distance betweentransducers.

WMT700 has been calibrated at the factory, and recalibration is not required. Periodiccalibration of WMT700 is not required for technical reasons. However, some qualitymanagement systems may require regular calibration of the measuring instruments. To fulfillthese requirements, it is recommended that you recalibrate the sensor every 24 months. Formore information, contact Vaisala Service Center.

If the sensor becomes contaminated, cleaning the sensor carefully using a soft, lint-freecloth moistened with mild detergent. Do not use solvents or a pressure washer to clean thesensor, since they may damage the silicon rubber transducer sleeve.

Do not clean the instrument or sensor unless it is clearly contaminated.CAUTION!

Some instruments and sensors or versions are heated. To avoid injury, donot touch heated parts when heating is on.WARNING!


Chapter 6 – Maintenance

163

Any temporary object (such as snow, ice, or a bird) that blocks theobservation path between the ultrasonic transducer heads may lead to inaccurate orincorrect measurements.

CAUTION!

Do not open the instrument or sensor. There are no user-serviceable partsinside.CAUTION!

In maritime environments, it is not possible to perform WMT700 software updates.

6.2 Testing Operation

Optional verifier (WMT70VERIFIER)

WMT700 measures the time it takes for an ultrasonic signal to travel from one transducer toanother. Therefore, the accuracy of the sensor depends on the distance between thetransducers and the time-of-flight measurement circuit, which uses a crystal oscillator for itstime reference.


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If necessary, you can verify the distance between the transducer arms with an optionalverifier. You can order the verifier from Vaisala as an accessory.

Vaisala recommends that you test the proper operation once a year or if you suspect thatthe transducers may have been damaged. You can perform the test either in the field or in alaboratory.

Do not perform the test when the wind speed is more than 10 m/s (22 mph) or when thereis a risk of thunderstorm in the area.

Some random data samples may be lost during the verifier test. This does not indicatethat sensor or instrument is faulty.

Disable heating before performing the verifier test.

To disable heating, disconnect the heater supply voltage or set the heaterOn parameter to0.

1. Slip the verifier over the 3 transducers.

2. Start wind measurement. The command depends on the selected communicationprofile.

3. Make sure that WMT700 reads less than 0.22 m/s (0.5 mph) with the verifier in place.

Chapter 6 – Maintenance

165

4. Remove the verifier.


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7. Troubleshooting

7.1 Problem Situations

Problem Probable Cause Remedy

Connection to WMT700 islost.

Power supply is not sufficient. Check that the power supplymatches the requirements listed in4.10 Powering (page 76).

Wind measurement failure.WMT700 is sending irregulardata values.

The installation site is causingmeasurement problems.

Check that the installation sitematches the requirements listed in4.2 Placing WMT700 (page 51).

Snow, ice, a bird, or some other object isblocking the measurement pathbetween the ultrasonic transducers.

Remove the blockage and checkthat the wind transducers are notdamaged. If the blockage is ice orsnow, it melts after some time ifyou are using a heated version ofWMT700. Duration of the blockagedepends on the severity of theweather event. If birds are causingthe blockage, consider installing abird cage.

Reported wind direction is notcorrect.

WMT700 is misaligned, which causes anoffset error.

Realign WMT700 according to 4.7Aligning WMT700 (page 63).

Wind direction indication actserratically.

Orientation of the sensor does notmatch the wndOrientationparameter value.

Set the wndOrientation parametervalue according to the actualorientation of the sensor. See D.Configuration ParameterDescriptions (page 187).

There is no response whenyou try to switch toconfiguration mode with theOPEN command.

The WMT700 settings are unknown orthey have been accidentally changed.

Reset the serial communicationsettings to default values. See 7.3Restoring Serial Port Settings(page 170).

WMT700 does not respond toany commands.

The communication profile is notcorrect.

Configure the communicationprofile to match the hostcommunication profile.

The wiring might be incorrect. Check the wiring, see 4.9 Wiring(page 72).

Connection works but datamessages are not available.

The command has been mistyped. Use the ERRORS command to fetchthe error messages fromWMT700.See 5.6.1 ERRORS — GetError Codes and Counts(page 106).

Chapter 7 – Troubleshooting

167


Data messages are not in theexpected format.

The selected data message is notcorrect.

If you are using automaticmessages: check the selected datamessage with the G command. Ifnecessary, set a new value for theautoSend parameter. If you areusing polling: Check that you areusing the correct data messagenumber in the polling command,see Table 44 (page 119).

Some items are missing fromthe data messages.

The configured data message does notcontain all the required items.

Define the data message againwith the required items. See 5.4Parameter Handling Commands(page 102).

Configuration commands donot work.

WMT700 is in measurement mode. Switch from measurement mode toconfiguration mode. See 5.1Communicating with TerminalSoftware (page 99).

WMT700 sends an errormessage as a response to acommand.

For probable causes, see 7.2 Error andEvent Messages (page 169).

For remedies, see 7.2 Error andEvent Messages (page 169).

No signal is present on analogoutputs.

Analog output has been disabled. Enable analog output with theaout1_mode and aout2_modeparameters. See D. ConfigurationParameter Descriptions(page 187).

Automatic data messages arenot received althoughparameters have been setcorrectly.

WMT700 is not in continuousmeasurement mode.

Initiate continuous measurementwith START command. See 5.5.2START — Start ContinuousMeasurement (page 106).

Data from WMT700 istemporarily lost.

The data logger and wind sensor are notin the same operating mode (polling orautomatic transmission mode).

Make sure that the data logger andwind sensor are both in eitherpolling or automatic transmissionmode.

Data messages are notreceived.

Baud rates of the data logger and windsensor do not match.

Change the baud rate so that it isthe same in the data logger andwind sensor.

Parameter does not changeafter S command has beengiven.

The parameter requires reset before itbecomes valid.

Check D. Configuration ParameterDescriptions (page 187) if reset isrequired before the parameter ischanged.

Inconsistent serialcommunication or missingdata.

Pin contacts of the connector havebecome oxidized or the connector is notfirmly attached.

Change the WMT700 cable.

Retrofit installation ofWMT700 is not possible.

You do not have the correct mountingkit for the retrofit installation.

Check that you are using thecorrect mounting adapter withyour mounting kit. See F. WMT700Accessories (page 197).


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WMT700 does not workproperly after retrofitinstallation.

Incorrect cables were used in the retrofitinstallation.

Check that you have used cableslisted in 4.11.5 Connection CablePrerequisites (page 92). If you donot have the correct cables,contact Vaisala technical support.

Connection to WMT700 islost.

The power supply is not sufficient,especially if you are using a heatedversion of WMT700.

Check that the power supplymatches the requirements in 4.10Powering (page 76).

7.2 Error and Event MessagesIf the messages parameter is set to 1, WMT700 sends error and event messages. Thefollowing table lists the available messages.

Table 57 Error and Event Messages

Error/EventCode

Probable Cause Remedy

2 Event. Parameters havebeen set to factorydefaults.

You can change the default settings in configuration mode; see5.1 Communicating with Terminal Software (page 99).

3 Event. Wind calibrationdata has been lost.WMT700 needs to becalibrated.

Contact Vaisala technical support.

10 Error. You have given aninvalid value when usingthe S command.

Check the allowed parameter values; see E.1 ConfigurableParameters (page 193).

11 Error. Parameter used withthe S command isunknown.

Check that you are using the correct parameter names, see E.1Configurable Parameters (page 193).

12 Error. Unknown command. Check the allowed commands in A. Command Set for WMT700(page 181).

13 Error. String before the endof command character istoo long.

Check the command and parameter names that you are using.

You can also troubleshoot WMT700 as follows:

• Fetch the error and event messages with the ERRORS command.• Include diagnostics-related items in the data message.

More Information

‣ Parameter Handling Commands (page 102)‣ ERRORS — Get Error Codes and Counts (page 106)


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7.3 Restoring Serial Port SettingsIf you are not familiar with the configured settings of WMT700, or if the settings have beenaccidentally changed, you may not get any response when you send the OPEN command toWMT700. In that case, restore the serial port settings to known values.



You can also use other terminal programs, such as Tera Term.



5. Select the correct COM port and then Configure.

6. Regardless of the configured port settings of WMT700, select the followingcommunication settings:

• Bits per second: 19200• Data bits: 8• Parity: None• Stop bits: 1• Flow Control: None

7. Close the New Connection Properties window.

8. Connect to WMT700 using the RS-485 interface.

9. Switch the sensor power supply off and back on.

10. Press # on your keyboard and hold down the key for at least five seconds. WMT700responds by sending the string:

OkRestoring COM1 and COM2 settings…

Updating the settings is completed in a few seconds. When the operation is done,WMT700 sends the following response:

Done. Rebooting…

WMT700 has now applied the settings and reboots using the new settings. For therestored settings, see the table below.

11. Before you start configuring new values to WMT700, apply the new settings toHyperTerminal. To close the connection, select Call > Disconnect.


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13. Select Properties > Configure.

14. In Bits per second, select 9600.

15. Close the Properties window.

16. Select Call > Call.

Table 58 Restored Serial Port Settings

Parameter Name Default Value Description

com1_baudcom2_baud 4 4 = 9600 bauds per second

com1_datacom2_data

8 Number of data bits

com1_delaycom2_delay

20 Response delay in milliseconds

com2_interf 0 0 = RS-485

com1_paritycom2_parity

0 0 = None

com1_protocolcom2_protocol

0 WMT700 protocol

com1_stopcom2_stop

1 Number of stop bits

The serial port settings have now been restored to known values. You can write theOPEN command and start configuring WMT700.

More Information

‣ Configuration (page 101)


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8. Technical Data

8.1 Measuring Specifications

Table 59 WMT700 Wind Speed Measuring Specifications

Property Description/Value

Observation range WMT701: 0 ... 40 m/s (89 mph)

WMT702: 0 ... 65 m/s (145 mph)

WMT703: 0 ... 75 m/s (168 mph)

WMT704: 0 ... 90 m/s (201 mph)

Starting threshold 0.01 m/s (0.0223 mph)

Resolution 0.01 m/s (0.0223 mph)

Response time 250 ms

Accuracy 0 ... 75 m/s: (168 mph) ±0.1 m/s or 2% of reading,whichever is greater

75 ... 90 m/s (201 mph): ±5% of reading

Available variables Instant, peak, average, maximum, minimum, gust, lull

Table 60 WMT700 Wind Direction Measuring Specifications


Observation range 0 … 360°

Starting threshold 0.1 m/s

Resolution 0.01°

Response time 250 ms

Accuracy ±2°

Available variables Instant, average, maximum, minimum

Any temporary object (such as snow, ice, or a bird) that blocks theobservation path between the ultrasonic transducer heads may lead to inaccurate orincorrect measurements.

CAUTION!

Chapter 8 – Technical Data

173

In extreme weather conditions, ice or snow accumulation may cause a temporary windobservation blackout even when heating is enabled.

8.2 Electrical Specifications

Table 61 WMT700 Electrical Specifications


Operating voltage 9 ... 36 VDC (absolute maximum 40 VDC) 1)

Heating voltage 24 ... 36 VDC (absolute maximum 40 VDC) 1)

Heating power supply requirement

No heating 1.50 W at 24 V

Heated transducers 31.50 W at 24 V (peak 40 W) 2)

Heated transducers and arms 151.50 W at 24 V (peak 200 W) 2)

Heated transducers, arms, and body 251.50 W at 24 V (peak 350 W) 2)

1) In maritime environments, the normal input voltage ranges are: operating voltage 10 … 30 VDC (-10% … +30%) andheating voltage 24 … 30 VDC (-10% … +30%), as defined in the maritime standard IEC 60945.

2) The actual power consumption depends on the temperature.

Table 62 WMT700 Output Specifications


Readout update interval Maximum 4 Hz

Units available m/s, knots, mph, km/h, V, mA, Hz

Operating mode Automatic message or poll mode

Virtual temperature Celsius degrees

Digital outputs

Communication interfaces COM1: RS‑485

COM2: RS‑485, RS‑422, RS‑232, SDI‑12

Communication profiles WMT700, WS425 ASCII, NMEA Standard andExtended (version 0183), SDI-12 (version 1.3), WS425ASOS, ROSA - MES12, Customized

Bit rate 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600,or 115200

Available averages Maximum 3600 s


174


Analog outputs for wind speed

Frequency push-pull Pulse 0 V/10 V: 0 ... 2 kHz (f = 10 Hz/m/s) (load > 10kohm)

Frequency pull-down Pulse 0.5 V/Vin-2 V (11 V minimum):

0 ... 750 Hz (load 50 kohm ±20 %)

Frequency pull-up Pulse 1.5 V/Vin-4 V (8 V minimum):

Voltage 0 ... 10 V (U = 100 mV /m/s)

Current 0 ... 20 mA (I = 0.2 mA/m/s)

Analog outputs for wind direction

Voltage 0 ... 10 V (U = 20 mV/°)

Current 0 ... 20 mA (I = 50 uA/°)

Potentiometer Reference voltage 1 ... 10 VDC, 0 ... Vref represents 0 ...359°

8.3 Environmental Specifications

Table 63 WMT700 Environmental Specifications


Operating temperature ‑10 ... +60 °C (+14 ... +140 °F)

-40 °C ... +60 °C (-40 ... +140 °C), or

-55 ... +70 °C (-67 ... +158 °F)

Storage temperature ‑60 ... +80 °C (‑76 ... +176 °F)

Operating humidity 0 ... 100 %RH

IP rating IP66 and IP67

EMC IEC 61000-4-2 ... 6

Emissions CISPR22

Environmental IEC 60068-2-1,2,6/34, 30, 31, 67, 78, IEC 60529; VDA621-415

Maritime DNVGL-CG-0339; Lloyd's Register requirements; IEC60945


175

8.4 Mechanical Specifications

Table 64 WMT700 Mechanical Specifications


Dimensions (H × W × D) 350 × 250 × 285 mm (13.78 × 9.84 × 11.22 in)

Weight

WMT700 wind sensor 1.8 kg (4.0 lb)

Mounting adapter 0.3 kg (0.7 lb)

WMT70FIX mounting kit 1.4 kg (2.2 lb)

Materials

Body and arms, mounting kit Stainless steel AISI 316

Transducers Silicone

Figure 46 WMT700 Dimensions


176

Figure 47 WMT70FIX Mounting Kit Dimensions

Figure 48 ASOS Mounting Adapter Dimensions

8.5 Accessory List

Table 65 Tools

Item Order Code

Zero Wind Verifier WMT70Verifier


177

Item Order Code

Cable Tightening Tool 237888SP

Table 66 Bird Obstructions

Item Order Code

Bird cage WMT70BirdKit

Bird perch WS425BirdPerch

Table 67 Cables

Item Order Code

Cable connector WMT70Conn

Cable 2 m, cable connector, open leads on one end 227567SP




RS-485 Cable 2 m, cable connector, open leads on one end 228259SP

RS-485 Cable 10 m, cable connector, open leads on one end 228260SP

MAWS cable 10 m 227565SP

AWS520 cable 10 m, shield connected to PE pin 229807SP

AWS520 cable 10 m, shield not connected to PE pin 227566SP

ROSA analog cable 10 m, cable connector, open leads on one end 231425SP

Adapter cable for WS425 serial 227569SP

Adapter cable for WS425 analog frequency output 227570SP

Adapter cable for WS425 analog voltage output 227571SP

Junction Box with Cable 2 meters ASM210719SP

Table 68 WMT700 Mounting Accessories

Item Order Code

Adapter for FIX70 228869

General purpose mounting adapter (suitable also for inverted mounting) WMT70FIXSP

Plastic mounting adapter for 60 mm tube WMT700FIX60-POM

Stainless steel mounting adapter for 60 mm tube WMT700FIX60-RST


178

Item Order Code

Cross-arm (requires WMT70FIX mounting adapter) WMT70CROSSARM

ASOS mounting adapter ASM212140

Table 69 WS425 Mounting Accessories

Item Order Code

Adapter for WS425FIX30, WS425FIX60-POM, and WS425FIX60-RST 228777

Mounting adapter for 30 mm tube WS425FIX30

Aluminum mounting adapter for 60 mm tube WS425FIX60

Sensor support arm for 60 mm pole (655 mm with integrated fix for item228777)

WAC425


179


180

Appendix A. Command Set forWMT700The following table lists all the commands available for WMT700.

Table 70 Command Set for WMT700

Configuration Mode / MeasurementMode and Profile

Command Description

Configuration mode ? Displays a list of configuration commands.

Configuration mode BAUD Changes or displays serial port settings.

Configuration mode CLEARERR Resets error counters.

Configuration mode CLOSE Switches the serial port to measurement mode.

Configuration mode ERRORS Displays error codes and counts.

Configuration mode G Displays either all or specified parameters.

Configuration mode H Displays list of data messages and available valuesfor measurement unit, profile, baud rate, interface,and analog output mode.

Configuration mode MEAS Starts wind measurement based on the user-configurable averaging time. WMT700 does notsend data messages automatically.

Configuration mode POLL Tests data polling.

Configuration mode RESET Resets WMT700.

Configuration mode S Changes selected parameters or defines new datamessages.

Configuration mode START Starts continuous measurement.

Configuration mode STOP Stops continuous measurement.

Configuration mode VERSION Displays the software version.

Configuration mode WIND_GET Fetches wind calibration information.

Measurement Mode WMT700 profile MEAS Starts wind measurement. The duration of themeasurement is based on the user-configurableaveraging time.

Measurement mode WMT700 profile OPEN Switches the serial port to configuration mode.

Measurement mode WMT700 profile POLL Fetches data from WMT700.

Measurement mode WMT700 profile SLEEP Switches WMT700 from normal operating mode tolow-power mode.

Measurement Mode MES12 profile @a M 12 Polls data from WMT700 in the MES12 data messageformat.

Appendix A – Command Set for WMT700

181

Configuration Mode / MeasurementMode and Profile

Command Description

Measurement mode WS425 ASOS F/Gprofile

WA Requests average wind speed and directionmessage.


WS Requests the verbose Built-In Test (BIT) results.


WT Requests the short response BIT results and status.


WD Reports the BIT status.


WF Returns a fixed pattern of data.

Measurement mode WS425 A/B NMEAExtended profile

$WIP Polls data from WMT700.

Measurement mode WMT700 NMEAMWV profile

$aabbQ,MWV Polls NMEA MWV message from WMT700.

Measurement mode WS425 A/B ASCIIprofile

I Requests identification information from WMT700.


Wx Starts measurement based on averaging time andfetches the data.


<esc><id> Polls data from WMT700.

Measurement mode SDI-12 profile ?! Queries WMT700 for its address.

Measurement mode SDI-12 profile a! Ensures that WMT700 is responding.

Measurement mode SDI-12 profile aI! Queries WMT700 for its SDI-12 compatibility level,model number, and firmware version number.

Measurement mode SDI-12 profile aAb! Changes WMT700 address.

Measurement mode SDI-12 profile aC! Starts concurrent measurement.

Measurement mode SDI-12 profile aCC! Starts concurrent measurement.

CRC is included in the response.

Measurement mode SDI-12 profile aD0! Fetches instant data from WMT700.

Measurement mode SDI-12 profile aM! Starts measurement.

Measurement mode SDI-12 profile aMC! Starts measurement.

CRC is included in the response.

Measurement mode SDI-12 profile aV! Starts verification.


182

Appendix B. Typical SystemEnvironmentsThe following figure shows a system in which the weather station is connected to COM2,while COM1 is left for service and maintenance purposes only. This is the recommendedsetup for WMT700 serial communications.

Figure 49 System Environment with Serial Port COM1 Only

The following figure shows a system in which the weather station is only connected to theanalog output channel. Serial port COM1 is used for maintenance purposes.

Figure 50 System Environment with Analog Output Only

Appendix B – Typical System Environments

183

The following figure shows a system in which serial ports COM1 and COM2 operateindependently. Serial port COM1 is used for maintaining WMT700 and monitoring the windsensor in mission-critical applications while COM2 provides continuous measurement data.

Figure 51 System Environment with Serial Ports COM1 and COM2

The following figure shows a system with a separate back-up battery for operating power.The heating power is supplied with a direct power supply unit that prevents the heatingfunction from consuming the power supply for the operations. This setup is suitable forWMT700 product types that provide heating for the wind sensor.

Figure 52 System Environment with Backup Battery


184

Appendix C. Default Settingsfor Different CommunicationProfiles

C.1 Default Settings for DifferentCommunication Profiles

Table 71 Default Settings for Different Digital Communication Profiles

Setting Parameter WMT700 WS425ASCII

WS425NMEAExt

WS425SDI-12

WS425F/GASOS

ROSAMES12

Service port

Protocol com1_protocol WMT700 WMT700 WMT700 WMT700 WMT700 WMT700

Baud rate com1_baud 9600 9600 9600 9600 9600 9600

Data bits com1_data 8 8 8 8 8 8

Parity com1_parity 0 (None) 0 (None) 0 (None) 0 (None) 0 (None) 0 (None)

Stop bits com1_stop 1 1 1 1 1 1

ResponseDelay

com1_delay 20 ms 20 ms 20 ms 20 ms 20 ms 20 ms

Data Port

Protocol com2_protocol WMT700 WS425ASCII

WS452NMEA Ext

SDI-12 WS425F/G ASOS

ROSAMES12

Baud rate com2_baud 9600 2400 9600 1200 2400 9600

Data bits com2_data 8 8 8 7 8 8

Parity com2_parity 0 (None) 0 (None) 0 (None) 1 (Even) 0 (None) 0 (None)

Stop bits com2_stop 1 1 1 1 1 1

ResponseDelay

com2_delay 20 ms 20 ms 20 ms N/A 20 ms 20 ms

Other Parameters

Address address A A A 0 1 12

Automaticmessagenumber

autoSend Disabled(0)

Disabled 15 Disabled Disabled Disabled

Appendix C – Default Settings for Different Communication Profiles

185


WS425NMEAExt

WS425SDI-12

WS425F/GASOS

ROSAMES12

Automaticmessageport

autoPort COM1 COM1 COM2 COM1 COM1 COM1

Automaticdatamessageinterval

autoInt 1 s 1 s 1 s 1 s 1 s 1 s

Windaveragingtime

wndAvg 1 s 1 s 3 s 1 s 5 s 600 s

Gustaveragingtime

wndGustTime 3 s 3 s 3 s 3 s 3 s 3 s

Installa-tionorienta-tion ofWMT700

wndOrientation Arrayfacing up

Arrayfacing up

Arrayfacing up

Arrayfacing up

Arrayfacing up

Arrayfacing up

Windmeasure-mentaveragingmethod

wndVector Scalaraveraging

Scalaraveraging

Scalaraveraging

Scalaraveraging

Scalaraveraging

Scalaraveraging

The parameters in the following table do not have a protocol-specific default value. They aredefined in the configuration code.

Table 72 Parameters with No Protocol-specific Default Value


WS425NMEAExt

WS425SDI-12

WS425F/GASOS

ROSAMES12

Interfacetype

com2Interf N/A N/A N/A N/A N/A N/A

Wind speedunit

wndUnit N/A N/A N/A N/A N/A N/A


186

Appendix D. ConfigurationParameter DescriptionsTable 73 Configuration Parameter Descriptions

Parameter Name DefaultValue

Allowed Values Units Description

address A String with amaximum of 40characters.

Address for WMT700. Notethat the SDI12, ASCII, NMEAExtended, ASOS, and MES12profiles use the first characteronly. SDI-12 only uses digits 1 …9.

aout1erraout2err 1000 0 … 32000 V, A, Hz, % Value for AOUT1 and AOUT2analog output if windmeasurement fails.

aout1_gaout2_g 1 0 ... 100 Gain for AOUT1 (wind speed)and AOUT2 (wind direction)

aout1_oaout2_o 0 -10000 … 10000 Offset for AOUT1 and AOUT2

aout1maxvaout2maxv 32000 0 … 32000 V, A, Hz, % Analog output maximum valuefor AOUT1 and AOUT2. Theoutput is fixed to this value.The unit depends on analogoutput mode.

aout1minvaout2minv 0 0 … 32000 V, A, Hz, % Analog output minimum valuefor AOUT1 and AOUT2. Theoutput is fixed to this value.The unit depends on theanalog output mode.


1 = Voltage

2 = Frequency

3 = Disabled

Analog output mode forAOUT1.


5 = Voltage

6 =Potentiometer

7 = Disabled

Analog output mode forAOUT2.

autoInt 1 0.25 ... 1000Resolution: 0.25

s Automatic message interval inseconds. This parameteraffects both serialcommunication and analogoutput. Do not select amessage interval that isshorter than the time it takesto send a data message.

Appendix D – Configuration Parameter Descriptions

187



aout_map 0 0 =

aout1, windspeed

aout 2, winddirection

1 =

aout1, North-South, xcomponent

aout 2, west-east, ycomponent

2 =

aout1, windspeed

aout2, windspeed alarm

A digital output:hi when windspeed > aout2_o

Parameter for analog outputsin road and rail tunnelapplications and craneapplications. The parameterprovides horizontal anddirection data.


2 = COM2 port

Serial port to which WMT700sends automatic datamessages.

autoSend 0 0 = Automaticmessagesdisabled 1 … 99

Automatic data messagenumber. Selects the datamessage format for automaticmessages.

cal_date Wind calibration date. This is aread-only parameter.

com1_baudcom2_baud 4 0 = 300

1 = 1200

2 = 2400

3 = 4800

4 = 9600

5 = 19200

6 = 38400

7 = 57600

8 = 115200

Baud rates for serial portsCOM1 and COM2. Changestake effect only after reset orthe RESET command. Notethat a low bit rate can affectmeasurement timing, ifWMT700 cannot send thedata message before a newmeasurement starts.

com1_data com2_data 8 7 = 7 data bits

8 = 8 data bits

Data bits for serial ports COM1and COM2. Changes takeeffect only after reset or theRESET command.

com1_delaycom2_delay 20 0 … 10000 ms COM1 and COM2 Responsedelay in milliseconds.


188



com2_interf 0 0 = RS-485

1 = RS-422

2 = SDI-12

3 = RS-232

Interface for serial port COM2.(The interface for serial portCOM1 cannot be changed.)

com1_paritycom2_parity 0 0 = None

1 = Even

2 = Odd

Parity for serial ports COM1and COM2.Changes take effectonly after reset or the RESETcommand.

com1_protocol 0 0 … 11 Protocol for serial port COM1.

• 0 = WMT700• 2 = WS425 F/G ASOS• 3 = WS425 A/B ASCII• 4 = WS425 A/B NMEA

Standard• 5 = WS425 A/B NMEA

Extended• 6 = WS425 A/B WAT11• 8 = MES12• 11 = WMT700 NMEA MWV

com2_protocol 0 0 … 11 Protocol for serial port COM2.

• 1 = SDI-12• 2 = WS425 F/G ASOS• 3 = WS425 A/B ASCII• 4 = WS425 A/B NMEA

Standard• 5 = WS425 A/B NMEA

Extended• 6 = WS425 A/B WAT11• 8 = MES 12• 11 = WMT700 NMEA MWV

com1_stopcom2_stop 1 1 = 1 bit

2 = 2 bits

Stop bits for serial ports COM1and COM2. Changes takeeffect only after reset or theRESET command.

freqType 0 0 = Push-pull

1 = Active pull-down

2 = Active pull-up

AOUT1 frequency output type.Setting 1 requires external pull-up resistor. Setting 2 requiresexternal pull-down resistor.

heaBMaxPower 150 0 = Off

150 = On

W heaBMaxPower setsmaximum body heater power.Setting the parameter value to0 disables WMT700 bodyheating.


189



heaPeakPwr 200 min ... max = 0 ...200 W

heaPeakPwr determines howmany resistors are on at thesame time. WMT700 has threeheater resistors for each arm.heaPeakPwr does not limitthe power in the body heaterof a heated version.

heaterOn 1 0 = Heater off

1 = Automatic

Heater control. When thevalue is set to 1, WMT700controls the heaters based onthe temperature and otherconditions.

messages 1 0 = Disabled

1 = Enabled

Response for parametersetting.

msg1, msg2, msg3, msg4 String with amaximum of 80characters.

User-configurable datamessage formats. Parameterscorrespond to the messageidentification numbers from 1to 4.

serial_n Serial number for WMT700.This is a read-only parameter

serial_pcb Circuit board serial number.This is a read-only parameter.

sleepTime 5 0 = Disabled 1 …32000

s Duration of the low-powermode in seconds. WMT700returns automatically tonormal state after this periodof time has elapsed. You canalso return to normal state bysending an extra space beforethe polling command.

startDelay 5 0 … 30 s Defines how long WMT700waits before activatingautomatic messages atstartup.

wndAvg 1 0.25 … 3600Resolution: 0.25

s Averaging time for windmeasurement in seconds. Thisparameter affects both serialcommunication and analogoutput.

wndCoast 0 0 … 100 0 =Disabled

m/s Wind direction coastingthreshold in meters persecond. When wind speeddrops below the limit, winddirection coasting isperformed. Only affects thescalar averaging mode.


190



wndCover 4 0 ... 20 seconds s Defines how long WMT700continues to report the lastvalid wind value if windmeasurement fails (forexample due to snow or birds).0 means that if measurementfails, WMT700 reports missingmeasurement dataimmediately.

wndDirOffset 0 -180 … 180degrees

Deg User-defined wind directionoffset.

wndGainLo 1 % Wind tunnel tests show thatthe bird cage systematicallylowers the wind speed readingby 1.5 % (cage) or 2.5 % (cageand net). The wndGainLoparameter can be used tocompensate for wind speedgain correction for the birdcage.

S wndGainLo,1.015

wndGustTime 3 0.25 … 10Resolution: 0.25

s Averaging time for windminimum and maximum inseconds.

wndOrientation 0 0 = Array facingup

1 = Array facingdown

Orientation of the transducerarms of WMT700.

wndRate 1 1 = 4 Hz

2 = 8 Hz

Hz Wind vector update rate. Forbest performance in windspeeds over 50 m/s, Vaisalarecommends the 4 Hz rate.

wndUnit 0 0 = m/s

1 = mph

2 = km/h

3 = knots

Wind speed unit. Thisparameter affects datamessages sent through serialinterfaces but has no impacton analog output.

wndVector 0 0 = Scalaraveraging

1 = Vectoraveraging

Wind averaging method


191


192

Appendix E. WMT700 NMEAMWV Profile

E.1 Configurable ParametersWhen the WMT700 NMEA MWV profile is selected, you can set WMT700 to send messagesbased on the configured automatic message interval or poll MWV message using the NMEAQuery command.

The following table shows the configurable parameters and their allowed and default valuesfor the WMT700 NMEA MWV profile.

Table 74 Configurable Parameters for WMT700 NMEA MWV Profile



Description

address N/A String with 2 characters, forexample WI

Address for WMT700. The address mustconsist of two capital letters A … Z

autoInt 1 0.25 ... 1000 Resolution:0.25

Automatic message interval in seconds. Donot select a message interval that isshorter than the time it takes to send adata message


2 = COM2 port

Serial port to which WMT700 sendsautomatic data messages

autoSend 0 0 = Automatic messagesdisabled

20 = WMT700 NMEA MWVautomatic data message

Automatic data message number. Selectsthe data message format for automaticmessages

com1_protocol 0 11 = WMT700 NMEA MWVprotocol

Profile for serial port COM1

com2_protocol 0 11 = WMT700 NMEA MWVprotocol

Profile for serial port COM2

com2_interf N/A 0 = RS-485

1 = RS-422

3 = RS-232


wndAvg 1 0.25 … 3600 Resolution:0.25

Averaging time for wind measurement inseconds




Appendix E – WMT700 NMEA MWV Profile

193



Description


1 = Miles per hour


3 = Knots

Wind speed unit


1) COM1 service port is always by default 0 - WMT700 protocol. You can change this using serial commands if COM1 is neededfor protocol-specific communication.1)

2) Wind speed unit and COM2 digital communication interface are defined in the order form. Default setting may be any of theallowed options , and it can be verified from the unit's configuration code.2)

To start continuous measurement, use the START command. You can stop the measurementwith the STOP command.

E.2 WMT700 NMEA MWV CommandsThis command polls data from WMT700 when the WMT700 NMEA MWV protocol isselected.

$--<id>Q,MWV*<chk><CR><LF>

$ Message header

-- Two-character talker ID of the polling unit

<id> Two -character WMT700 sensor ID; AA … ZZ

Q Query command

, Field delimiter

MWV Sentence formatter

*<chk> Checksum field(8-bit XOR, excluding $ and *)



To use WMT700 with the WMT700 NMEA MWV profile, either set the autoSendparameter to 0 to enable polling or define a fixed output interval with the autoIntparameter. If you are using automatic messages, the value for the autoSend parametermust be set to 20.


194

E.3 WMT700 NMEA MWV Data MessageWMT700 NMEA MWV data message is as follows:

$<id>MWV,<dir>,<ref>,<spd>,<uni>,<sta>*<chk><CR><LF>

$ Message header

<id> Two character sensor ID; AA … ZZ

MWV Fixed text


<ref> Reference: R = Relative

<spd> Wind speed

<uni> Wind speed unit: K = Kilometers per hour M = Meters per second N = Knots

<sta> Status: A = Valid data V = Invalid data

* Fixed text




Example of the command and response:

$IIWIQ,MWV*2F<CR><LF>$WIMWV,045,R,011.63,N,A*09<CR><LF>


• Talker ID "II" queries the WMT700 NMEA MWV message from sensor which has addressparameter set to "WI".

• WMT700 responds with talker ID "WI" and the requested MWV message. The reportedrelative wind direction is 045 degrees and the wind speed is 11.63 knots.

Missing Readings

If data is missing due to a measurement problem, the NMEA messages show "V" in thestatus field. Wind speed and wind direction fields are left empty.

E.3.1 Missing ReadingsIf data is missing due to a measurement problem, the NMEA messages show V in the statusfield. Wind speed and wind direction fields are left empty.

Appendix E – WMT700 NMEA MWV Profile

195


196

Appendix F. WMT700Accessories

Figure 53 Complete Set of WMT700 Accessories

Appendix F – WMT700 Accessories

197

1 Bird perch (WMT70BirdPerch)2 Bird cage (WMT70BirdKit)3 Zero wind verifier (WMT70Verifier)4 Vaisala WMT7005 Adapter for WMT70FIX, WMT700FIX-POM, and WMT700FIX60-RST (228869)6 Adapter for WS425FIX30, WS425FIX60, and WAC425 (228777)7 Plastic mounting adapter for 60 mm tube (WS425FIX60-POM)8 Mounting adapter for 30 mm tube (WS425FIX30)9 Sensor support arm for 60 mm mast (WAC425)10 ASOS mounting adapter (ASM212149)11 Stainless steel mounting adapter for 60 mm tube

(WS425FIX60-RST).12 Aluminum mounting adapter for 60 mm tube (WS425FIX60)13 Plastic mounting adapter for 60 mm tube (WMT700FIX60-POM)14 Stainless steel mounting adapter for 60 mm tube ( WMT700FIX60-RST)15 General purpose mounting adapter for WMT700 (WMT70FIX)16 Cross arm (WMT70CrossArm)17 Cable tightening tool (237888SP)18 Cables with open lead (227267SP, 227568SP, 228259SP, 237889SP, 237890SP)19 Vaisala MAWS cable (227565SP)20 Vaisala AWS cables (229807SP, 227566SP)21 Vaisala WS425 adapter cables (227569SP, 227570SP, 227571SP)22 WMT700 connector DIY kit (WMT70Conn)


198

Appendix G. Certificate

Appendix G – Certificate

199


200

Index

Aaccessories........................................................ 26, 177

complete set........................................................ 197ordering option....................................................25

adapter cable.................................................... 28, 94WS425............................................................. 95, 96

address query..........................................................154aligning........................................................................63analog output.................................93, 129, 130, 183

mode.......................................................................128parameter.......................................................66, 68scaling..................................................................... 45settings.................................................................. 128signal..................................................................21, 23wind direction data............................................ 43wind speed data..................................................43

analog output connections................................. 97analog voltage output...........................................96Aout1 / Aout2....................................................43, 45ASOS mounting adapter......................................90automatic message interval................................ 38automatic message mode....................................38available commands.............................................108averaging time........................................................ 149

Bbackup battery....................................................... 183bird cage..............................................................27, 70bird net................................................................ 71, 197bird perch..................................................................197body heating parameter.......................................82

Ccables............................................ 28, 72, 73, 80, 197

ROSA Cable 10 m................................................93RS-485..............................................................74, 75WMT700.................................................................93WS425.....................................................................94

cable tightening tool..............................29, 54, 197calibrating...................................................................27calibration data...................................................... 109certificate..................................................................199changing

communication profile.....................................133changing address...................................................155changing settings....................................................99COM1............................................................40, 73, 183COM2....................................................40, 73, 74, 183commands?............................................................................... 108?!............................................................................. 154a!............................................................................. 155

aAb!........................................................................ 155aC!................................................................... 156, 161aCC!......................................................................... 161aD0!............................................................... 157, 160aI!........................................................................... 157aM!...........................................................................158aMC!......................................................................... 161aV!...........................................................................159BAUD........................................................................ 105CLEARERR.............................................................. 107CLOSE............................................................. 100, 101ERRORS.......................................................... 106, 169G............................................................................... 104H............................................................................... 108I................................................................................148M 12........................................................................ 128MEAS............................................................... 106, 126OPEN...............................................................100, 126POLL........................................................ 38, 107, 127RESET......................................................................108S............................................................................... 103SLEEP...................................................................... 127START..................................................................... 106STOP........................................................................ 106VERSION.................................................................108WA..............................................................................137WD............................................................................. 139WF.............................................................................140WIN_GET.................................................................109WS..............................................................................137WT............................................................................. 138Wx............................................................................. 149

command set............................................................ 181communication interface..............................39, 40communication profiles.......................................133

default settings...................................................185compass safe distance........................................... 51compliances................................................................17configurable parameters.....................................193configuration............................................................ 101

example...................................................................26files........................................................................... 115parameters...........................................................109

configuration mode..............................................100connecting cables...................................................54connection cables............................................24, 92connector DIY kit................................................... 197connector pins

M23........................................................................... 75WMT700.................................................................97WS425.....................................................................97

Index

201

continuous measurement.....................................38crane application.....................................................68crane installation..................................................... 65cross arm........................................................... 60, 197current consumption..............................................77cyclic redundancy...................................................161

Ddata messages.................................................119–124

configurable........................................................ 109items........................................................................ 110WMT700 NMEA MWV.....................................195WS425 A/B NMEA Extended.......................146WS425 A/B NMEA Standard........................ 143WS425 F/G ASOS............................................. 140

deviation angle.........................................................65diagnostics...............................................................106digital communication interface....................... 20digital communication profile............................. 21digital communication units.................................21disabling body heating......................................... 82display help..............................................................108

Eelectrical specifications....................................... 174entering configuration mode........................... 100errors.........................................48, 124, 132, 167, 169exiting configuration mode.......................100, 101external interfaces...................................................38

Ffetching data...................................................107, 157fetching diagnostics..............................................137FIX30 / FIX60 / FIX70.....................................11, 86frequency.................................................................. 129frequency output.................................................... 43fully heated sensor................................................. 50

Gget message............................................................ 107get parameter......................................................... 104

Hhandling.......................................................................52heated transducers.................................................49heating......................................................... 20, 49, 50heating options........................................................48heating power supply............................................ 79

Iinformation commands....................................... 108installation

crane........................................................................ 65maritime...................................................................51

retrofit.......................................................82, 83, 97tunnel............................................................... 65, 66

installingbird cage................................................................ 70WMT700..................................................................51

Jjunction box...............................................................28

Llocation.........................................................................51

MM23 connector...................................................72, 75maintenance............................................................ 163manual......................................................................... 25mA output.......................................................... 66, 68maximum peak power............................................81Measnet........................................................................ 19measurement methods......................................... 38measurement mode.................................... 100, 126measurement mode commands...................... 125measurement path...................................................31measurement principle...........................................31measurement problem.........................................124measurement range................................................ 19MES12................................................................. 124, 128missing reading............................. 48, 124, 132, 195modes

automatic message.................................... 38, 119configuration...................... 41, 100, 101, 126, 135low-power............................................................. 127measurement.......................................41, 100, 125poll............................................................................ 38

mountingASOS mounting kit............................................ 90cross arm............................................................... 60vertical pole mast................................................57WS425 mounting kit..........................................83

mounting adapter30 mm tube......................................................... 19760 mm tube......................................................... 197general purpose................................................. 197

mounting adapters................................................. 24mounting kit

ASOS adapter...................................................... 90FIX30....................................................................... 83FIX60....................................................................... 83WS425............................................................. 83, 88

mounting kits.......................................................11, 86

NNorth arm.............................................................. 11, 63


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Ooperating power.......................................................77operating principle...................................................31operating WMT

WS425 analog output mode.........................128operating WMT700............................... 117, 118, 134

SDI-12 profile....................................................... 133WS425 profile..................................................... 133

orange sticker, see North armordering options....................................................... 18output signals...................................................47, 132output specifications............................................ 174

Pparameter descriptions....................................... 187parameters............................................................... 102

configuration....................................................... 187WS425 NMEA Extended Profile.................. 144

parameter value..................................................... 104peak power................................................................. 81poll data..................................................................... 127poll mode....................................................................38port settings................................................... 105, 170power consumption................................................77powering......................................................76, 80, 97power supply............................................................ 38problems.......................................... 48, 132, 167, 169profiles

F/G ASOS..............................................................135MES12...................................................................... 40ROSA.......................................................................40ROSA MES12........................................................ 128WMT700....................................................... 40, 125WS425 A/B ASCII..............................................147WS425 A/B NMEA Standard........................ 142WS425 A/B WAT11............................................150WS425 ASCII........................................................40WS425 ASOS....................................................... 40WS425 NMEA Extended..................................40WS425 NMEA Extended Profile.................. 144

protocolsMES12........................................................................41NMEA MWV............................................................41SDI-12........................................................................ 41WS425 ASCII......................................................... 41WS425 ASOS.........................................................41WS425 NMEA........................................................41WS425 WAT11........................................................41

Rresetting CPU.......................................................... 108resetting error counters...................................... 107restoring settings...................................................170

RS-232..........................................................................73see communication interface

RS-422......................................................................... 73see communication interface

RS-485......................................................................... 73see communication interface

Sscalar averaging.......................................................36SDI-12....................................................................40, 73

commands............................................................ 153see also communication interfaceconfigurable parameters................................. 151data messages................................................... 160profile...................................................................... 151

send identification................................................. 157sensor parts................................................................. 11sensor power..............................................................81serial communication............................................ 40serial connection.....................................99, 118, 134

analog output ......................................................39serial interface timing............................................42serial output.............................................................. 95serial port.........................................................105, 170

settings..................................................................105setting parameter values...........................103, 109show port settings................................................ 105show version............................................................108standards..................................................................... 17starting measurement...............106, 149, 156, 158starting verification...............................................159starting wind measurement.............................. 106status flags................................................................ 113stopping measurement....................................... 106support commands.............................................. 106

Ttechnical data ......................................................... 174temperature range................................................... 19terminal program....................................99, 118, 134testing operation................................................... 164trademarks..................................................................10transportation damper.......................................... 52tunnel installation....................................................65

Uunpacking...................................................................52upgrading WS425.................................... 82, 86, 88

Vvector averaging...................................................... 37verifier........................................................................ 164voltage................................................................77, 130voltage output......................................................... 131

Index

203

Wwind direction.................................. 34, 35, 137, 173wind direction averaging......................................36wind direction coasting.........................................37wind direction offset...................................... 63, 65wind direction output............................................131wind measurement commands........................106wind measurement on request.......................... 38wind speed........................................ 34, 35, 137, 173wind speed average..............................................120wind speed output................................................ 129wiring............................................................................72

COM2 RS-485....................................................... 74heated WMT700..................................................77non-heated WMT700........................................ 77retrofit installation.............................................. 93

WMT700 commands............................................. 181WMT700 NMEA MWV commands................. 194WMT700 profile commands..............................125WS425 A/B ASCII commands.......................... 148WS425 A/B NMEA extended commands.... 145WS425 A/B SDI-12........................................ 160, 161WS425 A/B WAT11

commands............................................................. 151WS425 cable.............................................................131WS425 F/G ASOS commands........ 136, 138–140

Zzero alignment..........................................................65zero wind verifier............................................ 27, 197


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WarrantyFor standard warranty terms and conditions, see www.vaisala.com/warranty.

Please observe that any such warranty may not be valid in case of damage due to normalwear and tear, exceptional operating conditions, negligent handling or installation, orunauthorized modifications. Please see the applicable supply contract or Conditions of Salefor details of the warranty for each product.

Technical Support

Contact Vaisala technical support at [email protected]. Provide at least the followingsupporting information:

• Product name, model, and serial number• Name and location of the installation site• Name and contact information of a technical person who can provide further

information on the problem

For more information, see www.vaisala.com/support.

Recycling

Recycle all applicable material.

Follow the statutory regulations for disposing of the product and packaging.

205

http://www.vaisala.com/warranty

mailto:[email protected]

http://www.vaisala.com/support


206

www.vaisala.com

http://www.vaisala.com

Documents

User Guide M211095EN-H - Vaisala · 2017-09-15 · M211095EN-H User Guide Vaisala WINDCAP® Ultrasonic Wind Sensor Series WMT700